any ideas- I have very poor flow to showerhead, temperature is fine.
Cold water tank & vented hot cylinder are in loft.
I don't really want to fit pump unless no other choice, would a York flange with a pipe running just to shower from the hot water cylinder & 22 mm pipe running from cold water tank to shower make much of a difference in flow.
any thoughts gratefully received.
If your pipework to the shower is currently run in 15mm, then changing this to 22mm may make a difference.
However, the problem is more likely due to the siting of your cold water tank and the hot water cylinder. There should be a mimimum 5 foot head of water to achieve an adequate flow rate. This means the bottom of the cold water tank should be 5 feet above the top of the hot water cylinder. This is not easy to achive in a loft, without putting the CW tank high up on stilts.
The best option is to resite the H/W cylinder on the floor below.
I had to do this in the first house that I bought after the previuos owner decided to rip out the airing cupboard and put the H/W tank in the loft.
pipe is already 22mm and I live in a bungalow so looks like the pump might be the best option. I have an SP60 single impeller pump 1.8 bar, could I use this to run the bath,basin & shower or would this not be possible.
Thanks to kenj & rosebery for the good ( very welcome) advice.
SP60 is a single ended version of TP60. You need equal pressure/flow from both hot and cold feeds otherwise the shower won't work properly. Therefore you need to pump both hot and cold feeds and a dual pump is best for that.
The CWS tank needs to be of sufficient size to be able to deliver the water volume needed for showering.
If you are not sure about this I'd recommend getting some people in to look, advise and perhaps quote to see precisely what your situation demands. Then you can decide if it's within your competance or not. Bear in mind that a bathroom is a special location under Part P of building regs if the pump has to go in there. I suspect you can put it in the roof though.
kenj "The best option is to resite the H/W cylinder on the floor below."
"this wouldn't actually work too well if the hot water has to be pushed back upstairs from the tank on the ground floor then up even further to the shower head."
This is precisely the way most 2 storey houses have been plumbed for many decdades. A cold water tank in the loft, and a hotwater cylinder in the first floor airing cupboard, usually in the bathroom. My own house is plumbed like this and I get quite a reasonable water flow in the shower.
I know that Arthur lives in a bungalow, but there is no difference to my 2 storey house in this instance, as my shower and hot cylinder are both on the first floor. The water does not have to be pushed all the way back upstairs. It only needs to pushed as high as the shower head.
Last edited by Kenj on Thu Mar 13, 2008 5:23 pm, edited 1 time in total.
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