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Might have to take that back... According to our tile center, the modern way is to use gripfill and stick the bog to the floor tiles. Any thoughts?

Most problems fixed: - Shower now vertical. - Shower outlet in the right place. - Floor fully trussed and rock solid. - Wall tiling done and looking excellent THEN - he puts the heating mat down on the floor and latexes it down... under the toilet pan...... The screws for securing...

I pointed out the shower valve and outlet and he seemed very happy to fix these. I only realised that he wasn't going to strengthen the floor when I saw that he's already screwed it down - and installed the bath on it... So I guess that he probably is going to have to remove the bath...

Confused... I do DIY - but with 2 kids simply don't have the time. So, got a builder in to do my bathroom - complete refurbish. Excellent reviews on Check-a-trade and good piccys of completed projects. So we are 4 days in and.... The shower valve is fitted at an angle. The shower...

The fluid velocity wil be higher than in 22mm for a given pressure and flow rate, but how long the 15mm needs to be, and why fluid velocity could be important beats me!

I couldn't agree more! - there must be a rational explanation. I'm a professional engineer and it's the satisfaction of solving enginering probems that has kept me enthusiastic about my work for the last 27 years!

You haven't quite got it right. The hot temperature INLET is 65C and that's fine. The thermal element only shuts the water off if the MIXED water temperature exceeds 45C and this would only happen if the cold water ceased. (The thermal element is a wax-filled capsule that sits in the mixer...

Well, to their credit, Trevi did eventually send an engineer to have a look. He spent about 4 hours with me, during which time I completely re-plumbed the cold in 15mm (thank god B&Q are close and PolyPlumb is quick to use!), removed both single check valves on hot and cold and tried several...

I had a discussion at work with one of the egg-heads of our mechanical engineering department and his conclusion was that it would make bugger-all difference to run a 15mm feed to the unit. However, Sooey is spot on - 15mm garden hose to the outside tap and let's see what happens. I'll...

I asked Trevi to explain why they thought 15mm to the cold inlet would work when 22mm would not - their reply was "read the F***ing manual" Might have to try it after all.....

I reckon that it should work - IT WILL NOT BEAT ME :evil: Already tried removing the outlet hose and blasting water through (and even re-routing the outlet pipe so no airlock was possible... but no joy. Also tried removing the mixer cartridge and reverse flushing it as suggested by...

Mmm - Trevi responded. They reckon that the problem is that the cold is plumbed with 22mm and not 15mm. Not sure why this would affect the shower. 15mm would affect flow pressure and flow rate, but this would be dependent on the length of 15mm pipe and number of bends. I have 17m of...

I tried removing the overtemperature cut-out (as Googlyhead states - this only shuts the flow off if the blended temperature exceeds 45C) but there was no effect. Definately plumbed in the right way round as per MI and also agrees with the "HOT" and "COLD" cast into the shower body. (Nice...

Mmm - a fault with the booster cartridge would be my final hope too. Seems unlikely though as it's a really simple piece of machined brass. Still, I've emailed Trevi all of my test results and now am waiting to see what opinion they have. If they can refer me to an 'expert' plumber, I'd be...

The valves are as previously used. The hot flow has been measured and is 100% OK.

At 38C maximum temperature, it's too cold for a comfortable shower. It's also a dribble. Single 22mm full-flow check valves as per MI installed in hot and cold flows.

I've installed one of these before and it worked brilliantly, for many years. Now I've moved home and installed another - but simply can't get it working! The wife is threatening physical violence if it's not working soon! :shock: I've spent some time optimising pipework to remove the...

I moved into a new house (4 years ago now) that has a gravity-fed system and a bloody noisy shower pump that feeds 2 showers. The original pump died after 2 years and the replacement QT pump now squeals like a pig after a few minutes. It's been installed absolutely to the manufacturers...

I'm looking at Shower-Baths. Should I stick with a 5mm Carron shower bath (1700 x 800) or go for the 8mm Carronite option, which seems very expensive to me. What options are there for DIY reinforcing a 5mm acrylic bath that's to be occasionally used for showering?

I'm no engineer, but most pop-up wastes only come up 10mm or so, so you would be adding, maybe 15mm total to the depth of the waste? Would that be a problem in most installations?