Communal Shower Block Advice

[Tiff838]

We have a communal shower block in our cricket club changing rooms. There are 4 shower heads which each have a mixer valve and are fed by 28mm hot and cold from a header tank and boiler. Water pressure is low due to being miles from anywhere.
For years the showers have caused us issues, whenever one mixer is altered another shower goes cold or hot.
In order to avoid this I have installed a 22mm thermostatic mixing valve and feed premisxed water to the showers through the old hot 28mm pipe. I have blanked off the cold side of the mixers and turned them all to max hot.
The result is perfect temperature but if I turn on more than two of the showers they pulse and if all 4 are on its just a dribble.
Please could anyone advise what causes this pulse and what i could do to stop it. Is it because the 22mm valve is feeding into a 28mm pipe, or do i need a pump, or do I need to take out the mixers.
Any advice is greatly appreciated and will keep 22 cricketers happy every weekend.

 

[ShaunCorbs]

Need more flow so upgrade the blending / mixing valve 28mm at a min 35mm better

 

[Tiff838]

Need more flow so upgrade the blending / mixing valve 28mm at a min 35mm better

 

[Tiff838]

Many thanks, I will get myself a larger valve, would a pump make any difference as well to increase flow and pressure

 

[ShaunCorbs]

Are you happy with the flow ? And tbh depending on the system it might need upgrading adding a pump isn’t just a bolt on item

 

[Tiff838]

The flow is very low so could do with increasing. Its been in 20 years + so is due a complete overhaul

 

[Rob Foster]

We have a communal shower block in our cricket club changing rooms. There are 4 shower heads which each have a mixer valve and are fed by 28mm hot and cold from a header tank and boiler. Water pressure is low due to being miles from anywhere.
For years the showers have caused us issues, whenever one mixer is altered another shower goes cold or hot.
In order to avoid this I have installed a 22mm thermostatic mixing valve and feed premisxed water to the showers through the old hot 28mm pipe. I have blanked off the cold side of the mixers and turned them all to max hot.
The result is perfect temperature but if I turn on more than two of the showers they pulse and if all 4 are on its just a dribble.
Please could anyone advise what causes this pulse and what i could do to stop it. Is it because the 22mm valve is feeding into a 28mm pipe, or do i need a pump, or do I need to take out the mixers.
Any advice is greatly appreciated and will keep 22 cricketers happy every weekend.

Where to are you ? as its a community project there might be one of us who can have a look, if you are within 50 miles junction 19 M6
I will call in no charge ...Rob Foster ...aka centralheatking

 

[Tiff838]

Hi Rob, thanks, I think we are further than 50 miles away. Harrogate, North Yorkshire

 

[Rob Foster]

It seems that the shower block is a long way from the utility main ? That might be a very expensive job to put a higher capacity main in. Looking at the lifestyle of the block it seems that it has occasional high demand and long periods of no use. I would consider a large capacity intermediate buffer tank holding cold water, it could be high level or even low level...cheaper. Then work out just how much water you will get through and double it to size the tank. Then pump the water to the heat source and to the showers in suitable diameter pipes. The tank need not be expensive we have used redundant commutated orange juice tanks, cleaned out, they hold 1500 litres and come with a screw cap. site on solid ground level plinth as they weigh 1.5 t. centralheatking

 

[Chalked]

Hi Rob, thanks, I think we are further than 50 miles away. Harrogate, North Yorkshire

I’m nearby. In fact I’m working near Sawley on Monday.

 

[Rob Foster]

If fact if you drain them in the winter, and site the tanks in the sun then they will warm up in the summer all week and save on your energy bill as well
just make sure the heating source gets over 60c to prevent any bug problems especially for the home side ! centralheatking