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Free Saturday Delivery on orders over £75

Product Details

Prevents foul smells and sewer gases entering the building.
Can be installed in a horizontal or vertical position.
Complete with 90° Inlet & Straight Compression Adapters.

Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 8pm Mon-Sat (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Viva Magna Self-Sealing Waste Valve 40mm is rated 4.5 out of 5 by 8.
Rated 5 out of 5 by from Waste Self sealing waste a good item un fortunately no use for my application
Date published: 2019-08-31
Rated 5 out of 5 by from Proper job! Simple to fit and doing the job (no more foul smells)
Date published: 2019-08-21
Rated 5 out of 5 by from Good product Excellent dry trap. Used 3No. with 32x28 rubber reducers for motorhome waste traps which will allow use in winter without freezing.
Date published: 2019-06-09
Rated 5 out of 5 by from Better than a water trap Great space saver and better function than a bottle trap or u bend
Date published: 2019-05-09
Rated 1 out of 5 by from Rubbish Purchased it to link in two washing machines. Water did not pass through and went back up pipe Zen’s kn to floor. Purchased McAlpine one and that did job.
Date published: 2019-04-13
Rated 5 out of 5 by from Sewage smell eliminated I bought this Viva Magna self sealing waste valve to stop the bad smell coming out of the shower waste which siphoned every time the sink was used. I had fitted a drain trap to the sink with a trap valve to try to overcome the problem but that was just a waste of money. I could have bought a much more expensive make of self sealing waste valve but decided to buy this one as it was much much cheaper and came with a compression adaptor and an elbow giving lots of options. Plus it was delivered free of charge the next day. I now have a completely smell free bathroom. Well done Viva Magna and Toolstation.
Date published: 2019-03-18
Rated 5 out of 5 by from Does the job Shower waste pipe was connected into stench pipe and smell was coming up the plug hole, fitted this on pipe outside and problem solved.
Date published: 2019-02-19
Rated 5 out of 5 by from Brilliant! Tried everything on the market to stop foul drain smalls coming back through my shallow bath and shower traps which passed as a result of evaporation of contents. Why oh why are these shallow traps so useless?!? Nothing worked until this little beauty came into my knowledge! Fitted one to each of my affected bathroom outlets and hey presto, smell has at last been defeated! Easy fit, but you do need a straight run of about 200mm of pipe to splice one in. Quality is excellent too, and compared to rivals, a total bargain.
Date published: 2019-01-22
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