Positive Head Shower Pumps

Positive head shower pumps are the usual choice when you already have some natural flow from a gravity-fed system and want the pump to cut in reliably when the shower is used. In simple terms, they suit installations where gravity can get water moving before the pump starts. That often means the outlet sits below the cold water storage cistern. If your system matches that layout, this collection gives you a focused place to compare pumps intended for that type of job.

The key check is whether your system is genuinely positive head before you buy. As a practical guide, a natural flow above about 2 litres per minute at the outlet before the pump starts is often a useful sign, but it is not the only test. If the available flow is too low, a positive head pump may not start when you need it to. In that situation, it is usually better to compare Negative Head Shower Pumps rather than assume the two types are interchangeable.

Once you know the system type, compare the pump around how it will be used. In the wider range here, you may see options associated with single and twin impeller layouts, which matters if you are boosting one feed or both hot and cold supplies together. There are also collection signals for different boosting roles, from an individual outlet to wider bathroom or household use, so it is worth matching the pump to the part of the system you actually want to improve rather than choosing on pump type alone.

Installation details can narrow the choice further. The supplied range centres on inline pumps in a 22mm size designation, with product data also pointing to checks such as minimum flow rate, maximum flow rate, pressure limits and supported applications. Those figures should be treated as product-specific suitability checks, not assumptions for every installation. If your shower setup involves other variables such as an electric shower, combi boiler position or wider boosting duty, the exact manufacturer approval matters before ordering.

If you already know you have a positive head gravity-fed system, this collection helps you shop with less guesswork. Start by confirming natural starting flow, whether one feed or two need boosting, and whether the pump is approved for your installation layout. If you want to compare more broadly first, see the full Shower Pumps range.