🚿 Shower Pump Selector

Answer a few questions about your water system to get a pump type and bar rating recommendation.

1. How is your water supplied?

Gravity-fed from a cold water storage tankUsually a tank in the loft feeding the shower Mains pressure (combi boiler or unvented cylinder)No cold water storage tank — a shower pump cannot be used, mains boosting is needed instead

2. Height of shower head vs. base of the tank

Shower head is level with or above the tank baseNegative head — no natural gravity pressure Shower head is less than 1m below the tank baseBorderline / weak positive head Shower head is 1m or more below the tank basePositive head — some natural gravity pressure

3. What are you boosting?

A shower or bathroomTwin impeller pump — boosts hot and cold together, needed whenever a shower or bathroom is being boosted Hot water onlySingle impeller pump — only used when it's specifically the hot water supply that needs boosting

3a. Pump body construction

Plastic bodyCheaper than brass — fine for standard domestic mains/tank water Brass bodyCosts more than plastic, but more durable — better for hard water, heavy use, or where longevity matters

4. Is noise level a consideration?

Yes, quiet running matterse.g. pump located near a bedroom or living space Not reallyLocated somewhere noise isn't an issue, e.g. loft or garage

5. Type of shower head

Handheld handsetOn a hose/riser rail Multifunction overheadFixed head with multiple spray settings Large fixed rain headWide-diameter, drench-style head

6. Measured flow rate at the shower (if known)

Litres per minute: Measure by timing how many litres come out in 30 seconds and doubling it. Leave blank if you haven't measured it.

7. How powerful do you want the shower?

Standard boost~1.5–2.0 bar Power shower~2.6–3.0 bar Not sureI'll take a sensible default

This gives general guidance based on common UK shower pump categories, not an exact hydraulic calculation. For borderline cases, unusual pipe runs, or if you're unsure about tank height, check the pump manufacturer's spec sheet or ask a plumber before buying.