15mm

Hi, We've recently had a pressurised hot water cylinder installed. When we use the kitchen tap it's quite a long run so the hot water takes a long time to run hot. I could fairly easily reduce about 7 metres of 22mm pipe down to 15mm (it already reduces to 15mm upstairs anyway before dropping...

Hi, First post here, I have usually been able to answer my questions through searching this forum but now I'm stuck! I have replaced the tiles in my shower with shower board and now reinstalling the Triton Dart 2 shower mixer. I had to cut the old olives to get the nuts off before fitting the...

I've bought a new chrome towel radiator as the old one is all rusty. I also bought new angled (standard) valves, 1/2" X 15mm as they too are old and rusty. But when I look at what comes out of the wall, it's clearly not 15mm pipe, looks more like 10mm (plastic). How have they gone from 15mm...

38kw combi boiler supplying a shower. 22mm or 15mm pipework? I am refurbishing a 1st floor bathroom and installing a shower to replace a bath and have a 22mm/15mm pipe quandary. There is currently a newish Worcester Greenstar 38CDi Classic combination boiler and my question is should I redo...

I have bought a house which needs a new heating system as it currently has a knackered old electric boiler. It’s currently running 8mm microbore which I’ve read enough about to know its rubbish and worth replacing while I have easy access to all pipe work. My question is about how to actually...

I've lifted up some floorboards in a house and found a Y shape tee joint on the central heating piping. It looks like two pipes sliced and jointed together rather than using a normal tee. The image below (on the link). Has anyone seen or can name this joint? or how/why or what the rationale is? is?

Hi lads and lasses sorry if this has been covered before but i couldn't fins anything on it. Im installing an outdoor tap and for the first time the pipework has to be external. Im fitting it to water regs standard with all the rubbings internal pipe sleeved out the wall then runs down 3 meters...

I have a a 3 story house with a combi boiler on the top floor and a crawl space under ground floor. The heating on the ground floor is rubbish and looking under the floor the pipes are a bodged mess of 15mm copper, 15mm plastic, 10mm copper and 10mm plastic, that is uninsulated and slowly...

Are B & Q 15mm isolating valves reliable and full bore? https://www.diy.com/departments/compression-isolating-valve-dia-15mm-pack-of-10/34085_BQ.prd

My son has a 3 bed terraced house and a damp patch on a ground floor timber floor/wall that I think is caused by a pin hole/failed joint in the copper pipe. Rather than just do a localised repair I intend to replace all the ground floor pipe. The exisiting setup has 22mm pipe dropping down from...

Hi there, The service valve on the water line, for the cistern, is leaking. Struggling to find a replacement as it seems to be an odd size, 15mm compression fitting and 3/4 inch screw on, on the other side. Anyone know where I can get one? Google searches coming up blank.

I have run 22mm plastic to three showers and 22mm copper to the bath. Intention was to run 22 all the way to below the bath with last bit in 15 as normal. The bath manufacturer now says they can't put the taps where we want. I don't want to chase in 22mm pipe into the wall (too deep). I could...

I’m trying to replace my TRV on my radiator but have found that my pipes are 15mm copper but the radiator has a 22mm radiator tail. There isn’t enough space between the valve and the radiator/pipes to fit a compressor (which is what I think I need...) the old broken valve looks like it goes...

Has anyone got any advise on this please. Can I use a compression reducer to connect a 15mm TRV to a 10mm pex pipe? Not sure if the compression would hold onto the pex pipe. Or do I have to go from TRV > copper > pex. Thanks, Mark

I currently have a central heating system with 15 mm pipework running up through the floorboards to the radiators. I would like to convert the 15 mm pipe to 10 mm pipe underneath each radiator and run the 10 mm pipe up the wall behind the radiator. Basically so I don’t see pipework coming up...

There's a Ebay seller selling two x 15mm Surestop water switches for £16. They are new and in the original packaging, but the old Speedfit connection, not the newer Polyplumb, but both do the same thing. Not sure about manufacturers warranty, but worth a punt. Last CALL ! TWO for £16. Surestop...

Hi, Does anyone know where I can get a Copper US size 1/2L to UK 15mm solder ring straight reducer in the UK? I need to convert a US pipe size to a UK size, and I can’t find one anywhere. It’s for a gin still, so needs to be copper and not plastic. Thanks

As per the attached pic, Im planning to run two radiator pipes inside a chase that ivew made in a partition wall so that the pipe work will all be hidden once ive finished the bathroom. The old pipe work is 10mm microbore with 15mm adapters and a short section of 15mm where the pipes came out...

Hello, I’m trying to fit a new Grohe tap. Flexi hoses are 15mm and don’t fit the 21mm (guessing it could be 22mm?) existing thread on the water feed valves. See pictures attached. Is there an adapter I can buy? Or do I need to replace the valve for a 15mm one? The copper pipework itself for...

The combi boiler has 22mm flow and return outlets but they are immediately reduced to 15mm as they come out the boiler. After the pipes come out of the boiler, they split off into 3 branches. Branch 1 is for a single radiator only. Branch 2 feeds about 9000BTU diownstairs and branch 3 feeds...