Checked all valves and they are all fully open. All hot taps in the house are fine its just the shower so Im assuming its because of the routing of the piping going up instead of under the floor then just up to shower. Basically, there is a pipe coming out of the centre of the top of the cylinder. It then tees off, one going down under floor, the other going up to the loft. This is the vent line with the shower teed off it. There is approx 1m, maybe a bit more, from shower head to top level of tank. Even less with the rainfall shower as its nearly touching ceiling.
Low pressure at shower
- Thread starter scottpetrie
- Start date
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What is the level difference between the tee to the shower and the cold tank water level? If it's too close it might be a problem. Usually it's most convenient to put the tee just above the loft floor level, so the pipe can be supported from the timbers, but maybe yours isn't.
Apart from that, I'm at a loss. As I said, I have about 1.3m, and video of mine attached, if it works. Not easy to see, but it gives an idea. It's OK for me, and the rose is overdue for a clean, I'll do that now!
Showers (file://DESKTOP-5LLM8R4/Users/user/Documents/Roger/Roger's%20docs/House/Showers)
The tee which comes off the hot pipe to the shower is on the floor in the loft
OK. Did the video work? Seems to be a problem.
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No it didnt
I'll try again, but I don't have much hope. Not that it would help you much anyway!
Just an idea and by way of experiment....
The vent pipe going up from the T, could you try (very) temporarily blocking it with a wine bottle cork or similar and seeing if that makes a difference? My thinking is that the hot to the shower might be drawing in air along with the hot water.
What's the level difference? Maybe you have a very shallow tank.
Funnily enough I was also thinking this may be causing air to get in and not allowing any pressure to build up. Ill give it a try, cheers. If it cures my issue, whats the fix
The tee is at the same level as the bottom of the tank. The water level is not even a metre. There is no ceiling height where the tank is situated to increase the height of the tank
So are you saying it's the best part of a metre from the tee to the tank water level? If so that rules out my theory, and probably Harry's as well.
The water tank is basically on the floor of the loft. The tee that goes to the shower is basically on the floor too, level with the bottom of the tank. I dont know how deep the tank is but I dont think the top of the water level is a metre above the tee
I don't really know for sure - maybe one of the plumber might know. What it needs is a one way valve to allow it to vent, but not allow air in the other direction.
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