Viva Universal 40Mm Waterless Self Sealing Waste Valve Trap Bath Kitchen 1" Bsp

Well made it fitted the 40mm which was a good fit on our solvent weld 1.5 inch waste outlet . No smells from waste and good flow

it is well made, robust and does what it is supposed to do

This is a good product. However it could have been excellent if in the instruction they informed you that before installation make sure the membrane (non return valve) is straight inside the unit. Mine was folded as a consequence I had to drain the bath (as it was not draining) and I poked a blunt tool through the membrane to open it, then I re installed it. I will buy again, good product but 1 star deducted for the hassle with the re assembly.

Did the job

Much cheaper than osma and it includes an elbow at no extra cost, which is just as well as my osma elbow did not fit it, just a few mm out. Took away all smells from the handwash sink in a commercial kitchen. There was insufficient space for a normal u bend trap and this is good value for money.

Worked perfectly, easy to install

Used on the waste of a washing machine where thete wasnt room to fit a conventional trap.

Poor low flow rate will cause issues. Because of the diaphragm rather than a lever flap this will cause issues with a low flow rate. It backs up a shower even though the pitch of the pipe is correct. I will now have to decide weather to remove the tray or the below ceiling.