which pump + or -

[0aceone0]

I have a shower, which is mains fed. The problem is i have had a loft conversion (bedroom with a on-suite). The shower in the on-suite is mains fed but the pressurer is next to usless. Which shower pump would i need to improve the flow, positive or negative. Also, where would i site the pump. On the ground floor or 1st floor.
Thanks in advance.
ps. Did not know the was a + and - pump till i started looking for one so dont know what the difference is

 

[tincup]

Hi

If your talking about an electric shower it cant be done.

 

[0aceone0]

why can't i just put a pump in to help the mains fed water to the shower

 

[bhm1712]

because they are not designed for use with an electric shower and the shower is not designed for use with a pump.

 

[swbjackson]

You can pump the water to an electric shower but you would need to install a break tank before the pump as fitting a pump to the cold main is not allowed under the water regulations.

 

[Onetap]

You can, or used to be able to, get electric showers with a built-in pump. Mira did them. I saw one because it was broken, probably not a good sign. It was a very small and flimsy-looking pump, ISTR.

Generally pumps on the mains aren't allowed. I think there is a maximum of 12 lpm or something like that. Above that, you need the supplier's permission because they can pull a negative pressure on the mains supply, leading to back-siphonage and contamination of the mains and huge costs to rectify the damage.