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Hi everyone. I'm fitting a CH towel rail, with an elbow angle adapter to take an electric element as well as the water. There's no taper on the thread, so the adapter screws in until the thread ends. At that point, the pipe connection is pointing out into the room, which is no good of course...

Okay thanks everyone, that's what I needed. I will drill the new hole :)

The soil downpipe on the outside is a fixture, at the moment there is a 4" pipe through the wall to it, where the old toilet was. Now I want to use a corner toilet, which is 500mm along from where the old one was. So my choice is whether to run internally, if that is even possible with the...

Hi, I'm redoing an ensuite and ideally would fit a corner toilet. It's on an outside wall but there's an existing 4" waste 500mm along the wall from the corner, inside. Do you think it's viable to connect to that existing waste using a flexi waste and angles, inside? Or using a 45 degrees and...

Yes, thanks for your input, it's given me the confidence to do something about it. Looks like I might have tried a bit too hard to support a local lad starting out.

My young heating engineer! He's taken a break while some late parts arrive and I picked up the valve he'd fitted then removed. It was full of the green goo, so I undid another joint, to the filter, which is the one in the photo.

Thanks, this was my instinct.

Grundfos did reply, and indeed they said it seals in the threads with a sealant or ptfe.

Goo In Pipe by Nigel R posted 14 Sep 2021 at 4:16 PMHi, I'm part way through having a boiler installed, and in a main valve and another compression joint my heating engineer has used a LOT of green goo that I think must be Boss Supergreen. There are gobs of it inside the ends of the pipe and in...

Exactly! But this is the Grundfos part and it's the same on their website. There is a perfect mating face on the other end, but not this one. I have an enquiry in with them, I'm expecting them now to confirm that modern sealants do seal it.

Thanks Johnny (y)

Morning. I have this connection to make, between 35mm copper pipe and a big Grundfos pump. The official Grundfos connector is this iron 1/14 bsp female. The brass adapter I've got screws in, too tight to do by hand but smoothly with a spanner. There's no mating face though, and it's a...

11/4 bsp

Yes, thanks I'll keep an eye on it, and indeed @Gasguru this system has been in this house for 20 years and I don't think it has ever worked properly. So now it's getting a separate 32-100 Magna1 pump and your 35l expansion tank and let's see.

I really lacked a reference, as the existing two Vaillant 628e could have either 6 or 10l expansion each (depending on round or square which I can't see yet) but in any case only have their standard pumps which were inadequate and never heated the farthest rads - so I wasn't trusting the system...

Thanks @fixitflav and @Gasguru. Good point about the water temperature when it's really cold, and the 35l nice and big concept to give the diaphragm an easy time, and making it movable. I think I have room for the 35l so I'll go for that. Thanks again :)

I have a large closed system with 29 rads over 3 floors plus cellar, total dissipation 38kW, what would you suggest for a pressure vessel? It's a heat-only boiler with a 300l megaflow hw tank. The boilers coming out have been fine for pressure with only their built in 20 litres, but they may...

Thanks so much for all the help everyone. I have all your advice in mind but also I've started to suspect a pair of double vertical radiators at the end of a run might be too cheap/faulty/upside down. No label on them. So I've put it down for the moment, while I sort out some other parts of...