Negative head water systems

Boost Showers and Taps in Negative Head Situations

Improve weak shower pressure or tap flow where the outlet is positioned above the level of the stored water supply. Shower Power Booster provides a compact solution for negative, zero and positive head installations.

If you have a slow dribble of water from your shower head, as little as 1.5 litres a minute - its not negative head and a Shower Power Booster will work automatically.

Suitable for negative headCompact inline installationSafe 12-volt operation
Shower Power Booster for a negative head shower or tap
Understanding negative head

How Does a Negative Head System Work?

The position of the shower or tap in relation to the stored water level determines whether an installation is positive, zero or negative head.

Diagram showing negative, zero and positive head water system positions
Negative, zero and positive head

Is Your Shower Above the Stored Water Level?

Negative head is the name given when a shower or tap is positioned above the level of a water storage tank.

In this situation a pump is required to physically pump the water up to the outlet.

The Manual Shower Power Booster pump can be used for negative, positive and zero head applications.

Negative head installation diagram
Manual operation

Switch the Pump On When You Need It

All automatic Shower Power Booster pumps can be switched to manual operation by plugging the power supply directly into the pump motor.

The pump can then be activated when required by switching on the power supply at the socket, or an electrician can connect it to the room's light switch or circuit.

Leaving the pump on when not in use will not harm it.

Before installation

Review the Installation Guide

The installation guide contains fitting information and diagrams for negative, zero and positive head applications. Review it before deciding where to position the pump or making changes to the pipework.

View Installation Guide ↗
Simple and flexible

A Compact Alternative to a Traditional Negative Head Pump

Shower Power Booster can be fitted where it is most convenient and used to boost the part of the system that actually needs improving.

Boost

Improve flow to showers or taps positioned above the stored water level.

Install

Compact inline installation without the space required by a conventional shower pump.

Fit

The compact pump does not require bulky support or traditional pump bracing.

Plug In

Operates from a safe 12-volt power supply connected to a conventional socket.

Manual Control

Operate the pump independently where gravity flow cannot trigger an automatic pump.

Use Less Energy

Uses approximately 12 watts while the pump is operating.

Customer reviews

What Our Customers Say

Reviews from our customers with negative head pressure problems. 

★★★★★
I had a double manual pump fitted as I had a negative head situation with my shower on a gravity fed system. Superb results and excellent customer service.
★★★★★
We literally had been pulling our hair out with our negative head shower problem as we’re unable to fit a pump to the concealed panel behind the shower so needed a solution for the loft. It was incredibly refreshing to be able to pick up the phone and speak to a lady at Shower Power Booster. Her knowledge and willing was to help was superb.
★★★★★
Been using the product for years, brings new life to a shower I have over my bath (negative head). The support from Alan and the team is also excellent!
Product guidance

Suitable Pumps for Negative Head Systems

A Manual Shower Power Booster can be used for negative, zero and positive head applications. Automatic pumps can also be operated manually where required.

Manual negative head solution

SP1 - Manual Pump Solution

For installations where the pump must operate independently of gravity flow. You can add a SP1U to double to boost gravity hot hot and gravity cold. Wire the transformer to come on the same time as a light switch?

View pump SP1 →

A two-pump arrangement for applications where a stronger boost is required on a single supply. Having operated the pump manually, back flow from the elevated shower head can cause the flow switch to start and stop automatically.

View SP21S →
Ask Alan

Negative Head FAQs

Straightforward answers to common questions about negative head installations.

Does the Shower Power Booster need to be secured to a wall or joist?

The pump is so compact it does not require any support or bracing.

How come it uses so little energy?

Unlike conventional pumps, the patented design creates the required boost with very low power consumption. The pump uses approximately 12 watts while operating.