3) Optional sealing ring for restricted access cap**All chambers over 1200mm invert are supplied with a restricted access cap in accordance with SfA7. They are suitable for use in both adoptable and non-adoptable applications to a maximum depth of 0. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Product Type. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Chamber Diameter: 450mm. 4 Brooks Rd. This module looks at how Wavin’s innovative, self-sealing waste valve Hep O® works, how it compares with conventional water traps and its wide range of applications. Drainage. Take a look at our other Hepworth Clay inspection chambers product ranges Covers and Frames 4 variations Shafts 5 variations Inspection Chambers 15 variations Bolt 2 variations All Hepworth Clay inspection chambers products Solutions. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. These are available to buy here. Suitable for Gravity Drainage & Sewerage. Silt traps or catch pits are typically used upstream of soakaway and attenuation systems to filter solids and prevent them from entering down-stream drainage and storm water storage systems. Clark Drain Inspection Chamber Manhole Cover 450mm Diameter. Add to basket. The FloPlast 300mm Mini Access Chamber (MAC) design and flexibility provides a practical, innovative and cost effective solution for the provision of access in a drainage system. £21. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Buy. 2 raising pieces with cover and frame. 110mm Polypipe Inspection Chamber Kit Manhole Plastic - Cover, Riser, Chamber. Calefa; Comfia. Wavin offers a wide range of deep and shallow Inspection Chambers for safe and easy. 2m. Enter postcode for local availability. com. The Polylok 150mm/300mm riser is designed for use with the Polylok 500mm covers, adapters and the 7 hole inspection/distribution chamber. 2m. (On private drains or sewers only, adoptable sewers to have min 0. It is used in drains where flexibility. £44. Hepworth Clay inspection chambers are manufactured under a Quality Management system to BS EN ISO 9001. It is an easily maintainable and cost effective way of protecting the downstream sustainable drainage system (SuDS). If the hole is square or rectangular you will need to take both the width and height measurements (as opposed to just the width of a circular one). Want some advice on how to install your Inspection Chambers, or interested in finding out more about our product range, take a look at our guides & tips. Download a sample report. Ensure sealing rings are used in conjunction with each riser section. SPK9 B125 round ductile iron. Reserve our last 3 bed home & enjoy summer in the city on your own private balcony on the top floor. Soil pipes. This is a crucial step in completing. ANALYSIS [21] It is helpful at the outset to review the regulatory framework under whichregulated electrical work is. 9 metres cover). Hepworth Clay inspection chamber raising piece 475mm depth 175mm Catalog code: SPIC4 Product specifications Identification specifications -Catalog code Wavin SPIC4 EAN Number 5027888002938 SAP number 000000000003031974 General specifications. Supplied with stoppers in inlets (4 only). They are suitable for use to a maximum depth of 3m. Find out more about Indoor Climate Solutions with Wavin. This chamber set includes all of the components required to form a 450mm diameter inspection chamber - one base section, two 235mm sectional risers and a circular polypropylene cover and frame. Hot and Cold solutions; Above ground commercial. Geo Textile Data Sheet. Hepworth - Clay Wavin Group Hazelhead Crow Edge SHEFFIELD S 36 4HG. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Inspection to say that no inspection was actually performed. B (drawing size mm): 3000*. Form new 110mmØ foul drainage pipe to discharge from new SVP/ AAV. From domestic properties to commercial buildings, find everything you need to meet current regulations and provide great aesthetic solutions to your outdoor space. 2021-01-06 23:00:00. 9) formed in the chamber's wall and for discharging the sewage into a main channel on the chamber's floor having an inlet and. Deep inspection chambers. 600mm diameter polypropylene inspection chamber for adoptable and non-adoptable applications. Browse our easy to install 450mm diameter chambers & lids to complete your drainage system. £93. Under site conditions, a test is applied in the presence of a Building Control Officer or Resident. This training courses finishes with a short assessment which allows you to check your understanding of the training material. Spend another £1500 to pay over time with. WavinCoil land drain. 00 incl VAT. Hepworth - Clay. 2m using R450. VAT. Inspection Chamber Set with Polypropylene Cover - 450mm Diameter For 110mm Drainage. 1 clay drainage brand in the UK, with a reputation second to none for product quality, technical ability and customer. Add to basket. NBS Source. 2m. This Inspection Record lists the compliance verification. Preformed bases : SPIC6/1 inspection chamber base 110/110 mm, depth 225 mm. Plumbing Systems. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Hot and Cold solutions; Above ground commercial; Below ground drainage. Within an area of decorative, coloured or natural stone paving, Recess Tray Covers,, sometimes referred to as "Inset covers", are invaluable, especially compared against the utilitarian covers commonly used in modern construction. £52. A base accepts pipes, either 110mm or 160mm in diameter, thanks to a varying number of inlets. They are suitable for use to a maximum depth of 3m. Collection. -. 1 and annex B gives details of granular material suitability), to achieve a common line and level with the main pipeline. Manhole— An opening by which a man may enter or leave a drain, a sewer or other closed structure for inspection, cleaning and other maintenance operations, fitted with a suitable cover. Contact our helpline on 01752 692 221 or use the live chat on your screen to determine which manhole cover will be the best fit for your project, and choose between cast iron manhole covers, stainless steel manhole covers, a patio drain cover and more. Bases D/S Equal Inspection Chamber Base a – straight channel only l 600mm dia. 2m. 2m. The product enables the drains to be cleared, cleaned and inspected when required. Add to basket. Enter postcode for local availability. Product Type - PPIC Inspection Chamber. Our trade standard chambers & lids are great for maintenance purposes to test, clear & prevent. London. Detecting leaks with a loud whistle. Hepworth have developed this guide to provide you with everything you need to know to specify, install and maintain a robust reliable drainage system, in either clay or plastics, for any application. Showing 1 - 5 of 5 products. For use with 150mm, 225mm and 300mm Hepworth Clay pipework via the appropriate adaptor. Inspection Chamber . uk: Hepworth - Clay 44 Products Found. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Cutting shaft – Shallow Inspection Chamber Order an Inspection Chamber Riser 320/470mm for Drainage and Sewer Systems. Hepworth Clay Universal Access Systems - Access chamber. Helps where connecting pipes are not perfectly aligned with MAC inlets. 1 Scope. 35 ex. Expected to cost: 20. 2m. Compliant with Sewers for Adoption 7th edition [SfA7]. As a family business based in Peterborough, we innovate, design and manufacture the vast majority of our access and drainage solutions right here in Britain, and we are proud that we can now display the Made in Britain mark on these products. In contrast, Wavin offers you a comprehensive choice of soil and waste systems and products for. Download the brochure. is a flexible material, built with alternating ridges and grooves. SKU: DRHSS130 The Hepworth Clay Universal Inspection Chamber 225 x 475mm (D x Dia) Black is integral to an underground drainage system. Inta Trade Tec Water Pressure Reducing Valve With Gauge 15mm. Plain ended system with push-fit flexible couplings for use in adoptable, housing, commercial, industrial and highway drainage. Hepworth Clay SPIC6/2 Mixed PPIC Polypropylene Inspection Chamber Base is a lightweight solution for private drainage systems that can be installed quickly and easily with no need for wet trades or lifting equipment. 2m. Base Depth:. 3 (2 reviews) Product Code: 800520. E600 Double Triangular Manhole Covers are made from durable ductile iron and are most appropriate for main roads and carriageways carrying particularly high volumes of fast moving heavy traffic and other areas carrying extreme wheel loads such as docks and ports. Download a printable PDF of your project. 57. buildings or connect with an inspection chamber, manhole, wall or other structure. Hepworth Clay square gully stopper 410456 Osma D/S equal inspection chamber base no. Use with 5-inlet inspection chambers. - Injection moulded in strong polypropylene. enquiry@wavin. chamber galvanised mild steel step irons at 250 or 300 stagggered centres throughout short length of pipe to be similar length to rocker pipe. The variety of inlet combinations available for the MAC and the choices of Chamber Risers, 100 and 200mm provide installers with a significant advantage when. The overall depth of the chamber from the invert level to the top of the manhole cover is 800mm. Hepworth Baptist Church is a member of the Fellowship of Evangelical Baptist Churches in Canada. Water reuse – By treating at water as the valuable commodity that it is and reusing grey and rainwater. BP440 Chamber Base 450mm / 110- Supplied with four easy fit bungs to block off unused outlets. Ex VAT Inc VAT. Product Type - PPIC Inspection Chamber. Size. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. . 14 Incl Tax: £62. View options. 2m. Our 450mm PPIC inspection chambers comply with the following standards and building regulations: BS EN 13598: 2010. 92 £53. Add to basket. 2. base straight channel and single inletPolypropylene inspection chambers (PPIC) are lightweight and robust, providing a cost-effective, faster and safer installation when compared to brick or concrete chambers. - They are reliable, quick and easy to install with ring seal sockets and a dry joint base to riser assembly. Hepworth Clay EPD for SDC4 . Polypipe Access Fittings & Puddle Flanges are certified to BS 4660:2000 and hold the Kitemark Licence KM59284. Polypropylene Mini Access Chamber 300mm diameter, depth 600mm. Inspection chambers should be used. Chamber risers Hynds Inspection Chamber risers are manufacturedDetails. It is installed to take wastewater from upper floor toilets, baths and sinks into the underground drainage system. £22. Verified by manufacturer 1 month ago . Cutting shaft – Shallow Inspection ChamberOrder an Inspection Chamber Riser 320/470mm for Drainage and Sewer Systems. 5 inches across, metal and have 3 flat head screws securing them (that have all sized up) My property only has one toilet. £179. Technical data: Brand - Hepworth. 200 mm. Wavin’s deep Inspection Chambers are approved to BS EN 13598-2 for deep applications. Wavin AS+ is the new best in class plastic sound-insulating Soil & Waste piping system, suitable for drainage of hot and cold waste water and in accordance with all requirements for non-pressurized waste water piping as laid down in BS EN 12056. Ultimately, our goal is to achieve Net Zero Carbon emissions by 2050. 3. Once you have this measurement you can shop confidently for recessed manhole covers. inspection chamber inspection chamber Prior art date 1982-05-21 Legal status (The legal status is an assumption and is not a legal conclusion. 63 £61. They are suitable for use to a maximum depth of 3m. UltraRib systems are designed for use in gravity drainage and sewerage installations at depths of up to 10 metres. Inspection Chamber In the case of the Shallow Inspection Chamber, remove profile plug(s) for the side outlets required Use standard jointing sequence to connect 110mm OsmaDrain pipes to inlets/outlet NOTE: The main through channel MUST be used. Hepworth - Clay. Choose Wavin Sentio to control your underfloor heating system. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. 25Every residential building must have at least one gully trap with at least one wastepipe discharging into it so that the water seal is retained. 3. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Shafts (5) Inspection Chambers (15) Bolt (2) Accessories (5) Fitting with 2 connections (9) Covers and Frames (4) Synthetic pit floor (12) Accessories (1) Ring Seals (2) Fitting with 1 connection (2) Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Osma 250mm Shallow Inspection Chamber Square Cover and Adjustable Frame 4D961. You can increase the height of an inspection chamber by 175 mm with a Hepworth SPIC4. Inspection Chamber to Thickwall Clay Pipe DS347 Inspection Chamber to Thinwall Clay Pipe DS348 Multi Rainwater Adaptor (Flexible) DS24 (Fits 110mm Pipe or Socket, external use only) Adaptor (Flexible) to 32mm/40mm Waste DS25 “Eazisleeve” Complete With Stainless Steel Clips Drain Adaptor Coupling DS26 DS27 PVC-PVC Adaptor DS28Take a look at our other Hepworth Clay inspection chambers product ranges Inspection Chambers 15 variations Shafts 5 variations Bolt 2 variations Accessories 5 variations All Hepworth Clay inspection chambers products Solutions. Approved and kitemarked to BS EN 13598-2:2009. Take a look at our other Hepworth Clay inspection chambers product ranges Fitting with 2 connections 9 variations Shafts 5 variations Inspection Chambers 15 variations Bolt 2 variations All Hepworth Clay inspection chambers products Solutions. They are suitable for use to a maximum depth of 3m. Hepworth SuperSleve inspection chambers are supplied complete with multi inlets to connect directly to SuperSleve pipe systems, any or all inlets can be easily adapted to Plastic drainage systems with. Download a printable PDF of your project. Non-man-entry inspection chambers. Hot and Cold solutions; Above ground commercial. This page photo-documents the installation of a 450mm diameter pre-fabricated Inspection Chamber (IC) into an existing drainage line in order to facilitate the connection of additional drainage elsewhere on the property. Our 450mm chamber can be used to an invert depth of 1200mm when used with a standard 450mm cover, or 3m when used with a restricted access cover. Black and Galvanised 8. Hepworth Clay drainage pipes. 110mm Underground Drainage Sewer Pipe x 3m Single Socket. Verified by manufacturer 28 days ago . 1 Material for bases. Call Us On 01502 801021. Can use a maximum of 12 risers to meet the maximum inspection chamber invert depth of 3m. 46NE317 - DN 150, left-hand branch. There are two types of eye examinations, basic and comprehensive. Hepworth Clay inspection chambers are manufactured under a Quality Management system to BS EN ISO 9001. Take a look at our other Hepworth Clay inspection chambers product ranges Synthetic pit floor 12 variations Shafts 5 variations Inspection Chambers 15 variations Bolt 2 variations All Hepworth Clay inspection chambers products Solutions. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Hepworth Clay inspection chamber 475mm depth 595mm Catalog code: SPIC2/1 Product specifications Identification specifications -Catalog code Wavin SPIC2/1 EAN Number 5027888015648 SAP number 000000000003031973 General specifications. Inspection Chambers and elastomeric joint rings in black. Code CLKS456. Inc. Wavin 600 D/S equal inspection chamber base 225mm 69NE300 Wavin 600 D/S equal inspection chamber base 300mm. Product Description. About this product. The difference between soil and waste pipes is that soil pipes carry water and solids into the sewer from your toilet, bidet or urinal. Deep inspection chambers. 00 incl VAT. Chapter 2 gives an overview of Hepworth Inspection chambers and guidance on how to select the most appropriate chamber for different applications including the implications of building regulations. 2 Abbreviations. 8/5. Add to. Our global collaboration with Lubrizol, [headquartered in the US] - the world’s largest manufacturers and inventors of CPVC compounds, gives us a. Exceptional performance 6 Tel: 1800 666 952 Email: [email protected] 4. Wavin Tigris K5 is Wavin's leading system for hot and cold drinking water. Hepworth - Clay Wavin Group Hazelhead Crow Edge SHEFFIELD S 36 4HG. Wavin Hep2O push-fit; Tigris K1 press-fit; Underfloor Heating. list of suppliers of inspection chambers and types of inspection chambers, elite precast concrete limited, wavin, osma, alumasc water management solutions, naylor drainage products ltd, pam building, naylor concrete products ltd, saint gobain pam uk, hepworth clay & terracotta, clark drain ltd, marshalls cpm, pipeline & drainage systems ltd, marley. Inspection chambers allow for inspection, cleaning and maintenance of a drainage system, and are placed where a change of direction or gradient occurs. As part of Brett Martin's Shallow Access Inspection Chamber Assembly, this Double-Seal Lid is specially designed for pedestrian use. StormForce Terms and Conditions of Sale. Inc. They are suitable for use to a maximum depth of 3m. Hepworth Clay inspection chambers are manufactured under a Quality Management system to BS EN ISO 9001. View trade pricing and product data for Hepworth - Clay, SPIC2/1 Chamber, Inspection 100/110mm PPIC 5 Inlets, & 4 Inlet Stoppers, Universals Clay or Plastics, Universal Access Systems. 9. Inspection Chambers . They are suitable for use to a maximum depth of 3m. 2m. They are suitable for use to a maximum depth of 3m. 11 An inspection chamber shall be fitted at each point where the direction of drainage pipes changes or at which the degree of slope changes or at junction of a branch and main line. 2m) 450mm PPIC manhole chambers are installed to create a change-of-direct and/or rodding access and inspection points for 110mm & 160mm uPVC drainage systems. (On private drains or sewers only, adoptable sewers to have min 0. vat. When there is a straight run of piping for more than 22 metres. Suitable for use with Hepworth Clay Supersleve drainage systems but can be converted for 110mm plastic piping with the simple adaptors supplied. 48. AquaCell NG PIM. View a range of chambers for use in adoptable or non-adoptable situations, at what depth and with which connection. 2m. Definition of Hepworth in the Definitions. Inspection Chambers . Our new range of inspection chambers to BS EN 13598 can be used in these scenarios. 00 incl VAT. Deep inspection chambers. 9 metres cover). 2m. Brett Martin Drain Inspection Chamber Riser Shallow Access 185mm Invert - 280mm. Hepworth Clay from Wavin is the No. Base, Insp Chamber Str 2x Equal 90Deg, for Range 600. Inspection chambers are provided with ribs at a distance of 50mm for 600mm diameter and at 32mm for 315mm diameter to cut according to invert depth suitability as per site condition. Inc. D/S equal inspection chamber base. Hepworth - Clay . Hepworth Clay Hepworth Terracotta Our Solutions Potable Water Rainwater & Stormwater Waste Water Foul. 4. Use with 5-inlet inspection chambers. Select collection branch for local availability. This chamber set includes all of the components required to form a 300mm mini inspection chamber - one base section, two 200mm sectional risers and a square PVC cover and frame) The overall depth of the chamber from the invert level to the. Sentio reduces the complexity and common problems which often occur with underfloor heating and cooling control. View trade pricing and product data for Hepworth - Clay, NE950 Connector Kit, Non Man-Entry Inspection Chambers, for Connection to IC Ranges, Inspection Chamber, Range 600. The difference between soil and waste pipes is that soil pipes carry water and solids into the sewer from your toilet, bidet or urinal. Can be cut to size in 60mm increments with an additional 60mm at the top. inspection chamber inspection chamber Prior art date 1982-05-21 Legal status (The legal status is an assumption and is not a legal conclusion. 2m. Inspection Chambers. Hepworth - Clay. SPKS8 A15 square ductile iron cover and frame. A complete 450mm Inspection Chamber Assembly offers a watertight, push-fit system that includes a 450mm diameter chamber base, 300mm deep riser, cover and frame, sealing rings and chamber reducer. Brett Martin Drain Inspection Chamber Riser Shallow Access 185mm Invert - 280mm. From 22 reviews. Plumbing Systems. £63. Clark Drain D400 Cast Iron SW Badged Manhole Cover & Frame - 600mm x 600mm x 100mm. Inspection Chambers & Bases are normally situated at one of three points in a drainage system. Jump to: Specification data ; Environmental information ; Add to spec +44 1709 856300 Website Contact manufacturer110mm Access Chambers. Clay is a future-proof material, 100% natural and 100% recyclable. Assessment – test your knowledge. SPIC2/1 inspection chamber 475 mm, depth 595 mm. Hepworth Clay inspection chambers are manufactured under a Quality Management system to BS EN ISO 9001. This is to suit a 450mm round inspection chamber. ). £51. Sign in. Could get a chamber rising piece to raise height of those in back garden if need be. 2. Inspection Chambers 100 and 150mm 7 SuperSleve HouseDrain 8-14 100mm Diameter Pipes and Fittings Pipes and Couplings8-12 100mm Diameter Connectors and. Range Hepworth Clay inspection chambers are supplied complete with multi inlets to connect directly to SuperSleve pipe systems, any or all inlets can be easily adapted to plastic drainage systems with the adaptor provided. To connect multiple pipes runs into a single drainage system at a known point. Hepworth Clay internal blanking plug 100/110mm. Deliveries take place between 08. Plain ended system with push-fit flexible couplings for use in adoptable, housing, commercial, industrial and highway drainage. com. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. item 1 110mm Osma Wavin Inspection Chamber Kit Manhole Plastic - Cover, Riser,. Hepworth Supersleve Inspection Chamber 940mm Deep With 100mm Outlets: Nr £ 591. View trade pricing and product data for Hepworth - Clay, 46NE319 Base, Chamber Straight Unequal, c/w 90Deg LH/RH Branch & Plug, Inspection Chamber, Range 450. Wavin Hep2O push-fit; Tigris K1 press-fit; Range 600 Inspection Chambers Product Details All Range 600 bases are polypropylene and supplied with a base-to-shaft sealing ring. Call the company. Verified by manufacturer 1 month ago . Inspection Chamber In the case of the Shallow Inspection Chamber, remove profile plug(s) for the side outlets required Use standard jointing sequence to connect 110mm OsmaDrain pipes to inlets/outlet NOTE: The main through channel MUST be used. 2m. Wavin offers a wide range of deep and shallow Inspection Chambers for safe and easy. 2m. PPIC Polypropylene Inspection Chamber. Size: 225mm, Finish: Polypropylene, TSI Code: 9784356, EAN Code: 5027888023544. . uk:. Catalog code Wavin SPKS8 EAN Number 5027888165299 SAP number 000000000004037548 Mixed Base PPIC Polypropylene. Mini Access Chamber Riser/SL. 2m. 8/5. They are all identical and are 10. 2m. Size: 475x940mm, Finish: Polypropylene, TSI Code: 9784301, EAN Code: 5027888008466. Silt traps or catch pits are typically used upstream of soakaway and attenuation systems to filter solids and prevent them from entering down-stream drainage and storm water storage systems. . Hepworth Clay inspection chambers are manufactured under a Quality Management system to BS EN ISO 9001. 44NE310 - DN 100. Add to basket. Form new 450mmØ NIC Hepworth Inspection Chambers with 150mm UltraRib Back Drop or similar approved, final position to be confirmed subject to full drainage survey. Hepworth Clay offers a range of multi inlet access and inspection chambers for private drainage applications up to a maximum depth of 1. Please enter your delivery postcode. 0 times the diameter of the larger pipe connecting into it. As a market leading contributor to the built environment, our sights are firmly set on leading our industry in sustainability by 2025. £32. Drainage Channels Drainage channels work by removing surface water away from a given area. Drainage Suffolk. Access Fittings & Puddle Flanges - PVCu. Standard inspection chambers. energy efficiency, comfort and ease of use. Foreword. Wavin Ltd. Hepworth Clay drainage pipes; Hepworth Clay channels & fittings; Inspection Chambers. Part Type: Shaft. We're proud to stock marke. To connect multiple pipes runs into a single drainage system at a known point. Hepworth - Clay . Table of contents. 1. 96. Hepworth Clay inspection chamber raising piece 175mm deep. 2 Pipe bedding The following specification is suitable in all areas other than – Beneath non-trafficked areas where the cover to the crown of the pipe is less than 450 mm. Non-man-entry inspection chambers with a 450 mm diameter shaft for use with 100 mm SuperSleve or 150 mm SuperSleve to a maximum of 3 m. Hepworth Clay Hepworth Terracotta Our Solutions Potable Water Rainwater & Stormwater Waste Water Foul Water Heating & Cooling. 2m. A number of discharge pipes may drain into a. ) A35 = Equivalent to Class A35 load category BS. tel: 01226 763561 fax: 01226 764827: [email protected]. 3. In addition, it trades through operating companies in Oman. g. However, your inspection chamber won’t always sit at the level required. -. To measure the clear opening size for your cover you need to take the measurements from the inside walls of the manhole from one side to the other. Deep inspection chambers. 9 metres, depending on the chamber and the application. 19. Product name. Contact Us. 150mm. Shallow inspection chambers; Deep inspection chambers; Hepworth Clay inspection chambers; Heating & Cooling. All of our underground drainage supplies are made from high quality and heavy-duty plastic that is hard wearing and maintenance free, making them a very cost effective choice for long term use.