Osma Waste Valve White 40 x 40mm (3962K)

£ 32.32INC VAT

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Osma Waste Valve White 40 x 40mm (3962K)

Hygienic, self-sealing waste valve. Can be installed horizontally and in confined spaces. Fits under baths and shower trays where space is limited. Prevents foul sewer air from entering a building and will not dry out.

  • Polypropylene Construction
  • Universal Compression Connection
  • Self-Sealing
  • Ideal for Confined Spaces

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Rated 3 out of 5 by from They do need changing eventual Had one of these fitted to a sink in our new home, came already installed. It lasted four years then started letting the sewer smell through. Bladder inside wasn't shutting properly, after a bit of research I found this was pretty common with them to fail like this. I was able to change for a traditional system but worth keeping in mind that they don't last all that long really. Hope that helps someone
Date published: 2022-02-13
Rated 5 out of 5 by from Problem solver These traps are a godsend if you have a problem with trap siphonage or lack of space. I have used them on several occasions with excellent results. Contrary to other reviews, the inlet to these traps is not 32mm. The inlet is designed to screw onto a 1 1/2" waste fitting. If you want to connect it in line with an existing 40mm waste pipe as a running trap you need to purchase a 40mm running adaptor to screw into the inlet of the trap. (Screwfix do not stock these.)
Date published: 2020-07-01
Rated 4 out of 5 by from Solving Connection Problem As previous posts point out one end is 40mm the other end is 32mm (June 2020) made to fit directly onto a 32mm sink waste plug fitting. How I made this product work was by buying a 32mmx 40mm straight connector MCALPINE ST28M STRAIGHT CONNECTOR WHITE 32MM X 40MM (95260) Take the 32mm nut off of the straight connector to reveal the thread, screw this thread directly onto the 32mm end of the valve and voila, it now fits in-line 40mm each end. Remember to get the water flowing the right way through the valve.
Date published: 2020-06-16
Rated 4 out of 5 by from Ideal for tight space Great product little expensive but never failed yet have used a few of them. It’s worth pointing out that one end screws on to plug waste so if you are not directly connecting to the plug waste then you will need a 32mm adaptor to connect to not a 40mm
Date published: 2020-05-26
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Can the membrane withstand boiling water

Asked by: Loki007

Outside air vent replacement?

If I put these valves at the highest point in my house can I remove my existing external air vent soil pipe?
Asked by: hobnob6464
No, sorry. The external vent is a requirement, and needed to ensure venting of gases. This will not allow any significant amount of air to flow down the soil pipe so vent is still needed.
Answered by: Kray
Date published: 2022-01-11

Can this be installed vertically?

Asked by: LazyBadger
These units can be mounted vertically and must be mounted this way for specific uses. Garbage Disposal (Vertical Only) Urinal (Vertical Only)
Answered by: Yuggr
Date published: 2020-06-05

is that a pack of 10 ?? as stated in the description??

Asked by: davenport1993
This is per valve. Can't see where you think it might be a pack of 10?
Answered by: Beatability
Date published: 2021-03-07
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A Size 40 mm
Brand Osma
B Size 40 mm
Colour White
Construction Material (Plumbing) Polypropylene
Fixings Supplied Screw Caps & Fixings Supplied
Manufacturer Guarantee 1 Year Guarantee
Model No CV1 WH
Pack Size 1
Parent Colour White
Pieces in Pack/Case 1
Product Depth 68 mm
Product Diameter 40 mm
Product Height 68 mm
Product Type Waste Valve
Total Product Weight 108 g
Trap Application Appliance
Trap Type Pedestal