Low Pressure - Would separate feed with bigger pipe help?

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9 Aug 2007
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I recently had central heating, boiler and electric shower installed. There is also a new water feed from the meter outside. The feed into the house is 32mm which reduces down to 22 mm inside and then further reduces to 15 mm at the first spur point of the feed.

The pressure at the shower is not great and the low presure light is usually on (with no other water in use). The shower is the last item on a 15 mm feed pipe that is connected to the following:
Boiler, kitchen sink, washing machine, bathroom sink, toliet, bath and then shower.

My question is would the shower performance and pressure be improved if it was fed directly on its own pipe from the 22 mm feed?
Also would it be better to use 22 mm as far as possible before reducing to 15mm to connect to the shower?

Thanks
 
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We moved into a house that did not have a shower or central heating and the bolier in the kitchen dated back to 1960. The electric shower was put in as a quick fix to enable us to shower while waiting for the boiler, heating etc to be decided on and installed. Unfortunately the pressure was too low to use the shower. We had all old galvinised steel pipes including the feed and it was thought this was part of the reason for the low pressure. Since it has all been replaced the pressure has improved slightly but not upto the 1.5 bar required by the shower.

The plan is to completely redo the bathroom with a thermostatic shower in the future (when we can afford it) and move the electric shower to a proposed en suite loft conversion.
 
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15 mm pipe is ample for electric shower. sounds like you have a blockage somewhere or loose sand that moves together when the water flows.
 

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