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bobster2543
Hi can anyone help, I have a unvented system we have very poor mains pressure, so a gundfus mq3.5 booster pump was fitted to the gravity feed from storage tanks to boost the feed to the bottom of the cylinder (taps /shower) , the pump has been acting up turning off and on and sometimes stopping completely half way through a shower! , i never liked the pump anyway it was to loud , so i have removed it from the system and now feeding the cylinder directly from the gravity from the storage tanks in the attic, the pressure from this is about .75 bar which is fine for down stairs but not upstairs where we now cant use the shower , my question is can i a Grundfos UPA 15/90 Home Booster Pump with flow switch be fitted to replace of the grundfus mq 3.5 which will boost the gravity feed into the cylinder as before, therefore boosting the hot and cold ? (or does it have to connected to the hot after leaving the top of the cylinder) i only need an extra 0.5- 1 bar pressure where can i fit this pump and will it work. i know they say that this pump is for vented systems but it can also be fitted to mains in a combi. i dont see the problem or am i missing somthing ?
Thanks Bob
Thanks Bob
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