In this guide
When a shower needs more from its water supply, the Shower Power Booster Pump gives you a compact, practical way to add pressure support without overcomplicating the job. It is built for low-flow shower applications and helps you focus on the feed, pipework and pump arrangement that will make the biggest difference.
Start by looking at where the problem sits. Once you know whether it affects hot, cold or both, you can choose a clearer route forward and keep the rest of the system working as it should.
A compact boost for low-flow showers
Shower Power Booster Pump delivers up to 1.1 bar of pressure increase and flow up to 9 L/min. Automatic activation starts from 1.5 L/min, while manual operation gives you an option for lower-flow or negative-head situations.
That gives you a tidy, focused solution for a shower feed that needs support. Match the latest manufacturer information to your own shower and water system before you buy or fit, and you can move ahead with confidence.
Built for a tidy, practical installation
A brass main body, plastic motor housing and vibration-conscious construction give the unit a solid, compact build for a shower-pressure job. Its quoted 50 dB measurement at 0.1 m also gives you a useful guide to the expected noise profile.
The pump connects to a standard household socket, keeping the electrical side straightforward where the installation is suitable. DIY and professional fitting can both be relevant, so use the route that suits the work and follow current manufacturer guidance.
Making pipework and head arrangements work
Shower Power Booster Pump works with 15 mm and 22 mm pipework. A 22 mm to 15 mm reducing set is supplied for 15 mm runs, making it easier to bring the pump into common shower pipework arrangements.
For positive-head systems, automatic activation begins from 1.5 L/min. Manual operation is there for lower-flow or negative-head situations. Check the feed arrangement and available flow first, then choose the setup that gives the pump the right job to do.
Choose the right feed arrangement
One unit boosts one feed. Two linked units can boost two feeds, giving you an arrangement comparable in function to a twin-impeller pump. Our guide, Single vs Twin Impeller Shower Pumps: Your Complete Guide, helps you work through that choice.
For a greater boost on one feed, the Water Pressure Booster Pump - Automatic & Manual Pack is a useful option to compare. Where both hot and cold feeds need attention, look at the Shower Pressure Booster Pump - Double Automatic Pack. The key is to match the pump arrangement to the supplies you have.
Helping an electric shower perform at its best
Electric showers need a steady incoming cold-water supply to keep their heating behaviour stable. The pump can support incoming pressure and flow, with 0.8 bar the relevant incoming-pressure figure to check alongside the current shower information.
Take a look at How to Improve Your Electric Shower for more practical checks. Confirm the shower and pump are a good match, then you can target the improvement where it counts.
Working with a combi boiler
Shower Power Booster Pump can sit before or after a combi boiler, giving you useful flexibility when planning the job. Before the boiler, it can support whole-home pressure. After the boiler, it can support up to three underperforming taps or showers.
That makes pump position an important part of the plan. Check the current product information and have the water and heating arrangement assessed competently, then place the pump where it will do the most useful work.
A clear role alongside hot-water recirculation
Hot-water recirculation helps move hot water around a system, while outlet pressure is a separate question. Increasing recirculation-pump power may speed circulation without automatically improving the pressure at a tap or shower.
Where a recirculation pump is already in place, Shower Power Booster Pump can work alongside it to add pressure. A competent system plan keeps both pumps working towards the right result.
Pumping from the mains inlet
At the time of writing, manufacturer guidance says that UK Water regulations state that a pump can only be fitted to the mains inlet if it does not exceed 12 L/min. The Flowflex In Line Micro Pump has a maximum flow rate of 9 L/min, making it perfect as a whole house solution directly off the mains inlet.
The Water Supply (Water Fittings) Regulations 1999 include a notification requirement for pumps or boosters drawing more than 12 L/min when connected directly or indirectly to a supply pipe. A 9 L/min figure does not, by itself, confirm that a particular installation is lawful or suitable. Customers should check that the latest manufacturer guidance remains relevant to their own system before purchase or installation.
Fortic and close-coupled tanks
At the time of writing, manufacturer guidance says that the Automatic and Manual Pack can be used to give a double boost to the hot output of a Fortic & Close Coupled Tank. The Double Automatic Pack can be used to boost both the Hot & Cold outputs.
That gives you clear options to explore when your tank arrangement needs a more focused boost. Customers should check that the latest manufacturer guidance remains relevant to their own system before purchase or installation.
Unvented tanks
At the time of writing, manufacturer guidance says that the Automatic and Manual Pack can be used to give a whole house solution if you have an unvented tank. You can either install two pumps before the cylinder, two pumps after the cylinder, or a pump before and after cylinder.
The Double Automatic Pack can be used to give a protected flow solution if you have an unvented tank. Two pumps installed on the hot & cold feeds to a specific outlet will help protect the flow rate and avoid fluctuations in water temperature. Customers should check that the latest manufacturer guidance remains relevant to their own system before purchase or installation.
Take the next step with confidence
Identify the affected outlets, compare hot and cold behaviour, and establish the water and heating arrangement. With that picture in place, you can check the latest product information and get qualified advice where you need it for electrical connection, water regulations or system changes.
Then explore the Shower Power Booster Pump collection to compare the options and choose a setup that gives your shower the support it needs.