Hi All, looking for some advice please....
I have a gravity fed system with a Trevi Boost Venturi shower valve and also a basin tap on the ground floor and the hot water supply is delivered over an approx. 20m long 22mm pipe run. The HW tank is on the first floor and this is fed from a CWT directly above in the loft. The problem I have is that the HW supply intermittently stops flowing which I believe is due to low pressure over a long pipe run. It has been suggested that a pump would solve this problem. This would be mounted in the loft near the CWT.
Looking at various negative head pumps they all recommend fitting a flange (Surrey, or other type) to the HW tank (and also a gravity loop in some cases) in the feed to the pump. I understand this is to avoid the possibility of air reaching the pump. My question is whether this is really necessary as it will be a fair bit of work? Could a simple air vent be used in the feed to the pump?
Thanks
I have a gravity fed system with a Trevi Boost Venturi shower valve and also a basin tap on the ground floor and the hot water supply is delivered over an approx. 20m long 22mm pipe run. The HW tank is on the first floor and this is fed from a CWT directly above in the loft. The problem I have is that the HW supply intermittently stops flowing which I believe is due to low pressure over a long pipe run. It has been suggested that a pump would solve this problem. This would be mounted in the loft near the CWT.
Looking at various negative head pumps they all recommend fitting a flange (Surrey, or other type) to the HW tank (and also a gravity loop in some cases) in the feed to the pump. I understand this is to avoid the possibility of air reaching the pump. My question is whether this is really necessary as it will be a fair bit of work? Could a simple air vent be used in the feed to the pump?
Thanks