Need a bit of help replacing an old leaking exposed shower valve, specifically finding something to replace it with.
It's a round type of valve (old Bristan Pisa) rather than a bar-shaped valve, see attached pic. The inlet pipe centres appear to be about 155mm.
I bought a new valve before but the pipes in the wall were too big to fit the new valve. Foolishly, I didn't take photos or notes at the time, and now I'm coming back to it a few months later, I can't remember what size the pipes were either in the wall or on the valve that I bought.
I'm going to assume that the valve I bought had 15mm inlets, as that seems to be that standard - it was just a cheap one from Screwfix.
1. As long as I get my inlet pipe sizes and centres right, can I replace a round exposed valve with a bar-shaped one? I guess the round valve is probably screwed in through the tiles so I'll have to fill the holes in the tiles? Any other issues that I'll need to address?
I'm not too familiar with plumbing so I've been reading up about different pipe sizes online. I'm guessing that the pipes in the wall are either 3/4" (19mm?) or 22mm.
2. From what I've read online, 22mm seems like the more common size than 3/4". Does that sound right?
3. Does anyone know about the Bristan Pisa exposed valve, specifically what size inlets it uses, and what pipe centres? I can't find anything about it online at all.
4. So, I'm thinking I should buy a shower valve that uses 22mm inlets. If it turns out that the pipe is only 3/4", can I just pop a 22mm olive on and it'll work ok? Or is the size difference too much, and it won't seal?
5. Pipe centres: My research shows that most (all?) valves are based on 150mm centres. I've measured repeatedly and I'm pretty sure the existing one is at 155mm centres. The wall is masonry, and I don't want to remove any tiles. Is it likely that I'll have sufficient "wiggle room" to fit a valve with 150mm centres?
Then my challenge will be finding a valve - none of the online stockists that I've found allow you to filter by inlet size or pipe centres, which means trying to read the installation instructions for all of them. What a pain.
6. Does anyone know of a cheapish exposed valve with 22mm inlets?
7. Would it be easier and better to replace the cartridge and seals? The body of the unit leaks, and the thermostat doesn't work properly.
Thanks guys.
It's a round type of valve (old Bristan Pisa) rather than a bar-shaped valve, see attached pic. The inlet pipe centres appear to be about 155mm.
I bought a new valve before but the pipes in the wall were too big to fit the new valve. Foolishly, I didn't take photos or notes at the time, and now I'm coming back to it a few months later, I can't remember what size the pipes were either in the wall or on the valve that I bought.
I'm going to assume that the valve I bought had 15mm inlets, as that seems to be that standard - it was just a cheap one from Screwfix.
1. As long as I get my inlet pipe sizes and centres right, can I replace a round exposed valve with a bar-shaped one? I guess the round valve is probably screwed in through the tiles so I'll have to fill the holes in the tiles? Any other issues that I'll need to address?
I'm not too familiar with plumbing so I've been reading up about different pipe sizes online. I'm guessing that the pipes in the wall are either 3/4" (19mm?) or 22mm.
2. From what I've read online, 22mm seems like the more common size than 3/4". Does that sound right?
3. Does anyone know about the Bristan Pisa exposed valve, specifically what size inlets it uses, and what pipe centres? I can't find anything about it online at all.
4. So, I'm thinking I should buy a shower valve that uses 22mm inlets. If it turns out that the pipe is only 3/4", can I just pop a 22mm olive on and it'll work ok? Or is the size difference too much, and it won't seal?
5. Pipe centres: My research shows that most (all?) valves are based on 150mm centres. I've measured repeatedly and I'm pretty sure the existing one is at 155mm centres. The wall is masonry, and I don't want to remove any tiles. Is it likely that I'll have sufficient "wiggle room" to fit a valve with 150mm centres?
Then my challenge will be finding a valve - none of the online stockists that I've found allow you to filter by inlet size or pipe centres, which means trying to read the installation instructions for all of them. What a pain.
6. Does anyone know of a cheapish exposed valve with 22mm inlets?
7. Would it be easier and better to replace the cartridge and seals? The body of the unit leaks, and the thermostat doesn't work properly.
Thanks guys.