positive or universal?

Deciding the type of shower pump needed in an installation is determined by the position of the cold water tank in relation to the outlet point. As a general rule, if the cold water tank is above the outlet point and there is a flow of at least 0.5 lpm from the outlet, a positive head shower pump is required. If the cold water tank is below or there is little or no flow, a universal head shower pump is required.

centrifugal or regenerative?

There are two types of impellers to help deal with different installation situations. One is centrifugal; the other is regenerative.

Centrifugal impellers are highly efficient but less tolerant to air generated in the system. They offer higher flow rates compared to regenerative pumps, and are ideal to use when the pump is situated well below (>2m) the height of the cold storage tank and when pipework and bends can be kept to a minimum.

A shower pump should be sited as close to the hot water cylinder as possible. However, if the shower pump is fitted in the loft or above the hot water cylinder (minimum static head required), regenerative pumps are a better choice as they tend to be less affected by the air that can accumulate in the system. Regenerative impellers are specially designed to aid removal of air generated in the system. They offer slightly lower flow rates compared to centrifugal pumps, and are ideal to use when pipework is complicated by many bends and elbows.

Our Supergen shower pumps have regenerative or centrifugal impellers, browse the range below.

plastic construction?

The plastic bodied Supergen pumps offer a cost-effective solution for boosting. The Supergen 58TX and Supergen 15SX are manufactured in the UK, and fitted with low speed motors that reduce noise, not performance.