Matching Pump and Shower Flow Rates?

[tontocamper]

Hi, hope you can help. I have a Shurflo Trailking water pump, 7 lpm flow rate. Can I use this in my water system with a tankless water heater that operates at 10 lpm flow rate?

I'm not sure if it's best to exchange the pump for a higher flow rate?
Or downsize the shower to a 5 lpm flow rate? But will a 7 lpm pump be too hefty in this scenario?

When reading the tech specs, the pump says 30 psi and the shower is rated for 20-80 psi, so I don't think the pressure will be an issue.

The pump will also be supplying one small sink. We won't be using both at the same time.

Many thanks, Lottie

 

[Jwats]

Hey, yes that would work fine I would say, you could probably uprate the pump but even the biggest vans only have 11.3lpm flow rates so won’t gain a tremendous amount for the cost output. Always easy enough to swap the pump out if it is sub-par. If anything you’ll probably get hotter water with a lesser flow rate than the boiler is rated at.

 

[Jev88]

I think our shurflo is 15-20 psi but it is an American build.

I have read don't go more than 5 psi higher than original install.

 

[f6c]

Welcome aboard

 

[mitzimad]

limiting factor is usually the water heater which will have a max psi rating go over that and you can split the heater

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