pearley Posted June 11, 2021 Report Share Posted June 11, 2021 Our old boat had a FloJet water pump which gave up to 12.5 litres/minute at 35 psi which gave a good shower through a large rain shower head. New boat has Parmax with 11 litres/minute at 25 psi which gives a pathetic shower. The cold water from tank to shower is about the same, the hot had to travel almost twice as much. I have a spare FloJet so is there any reason, other than size difference, why I can't substitute it? Or buy a higher pressure, higher flow Parmax with same footprint? Link to comment Share on other sites More sharing options...
Tony Brooks Posted June 11, 2021 Report Share Posted June 11, 2021 It will be fine as long as your calorifier PRV is at least 5 psi higher rated than the pump cut out pressure. Do you have a water economy shower head fitted? Does the pump cycle while you shower, if yes then another pump may not make any difference apart from to the cycling rate. Some showers have a restrictor in one of the hose unions, have you taken it out? Link to comment Share on other sites More sharing options...
pearley Posted June 11, 2021 Author Report Share Posted June 11, 2021 (edited) PRV is the 4 Bar one fitted by Surecal. Pump on old and new do not have accumulators so pump running all the time after residual pressure in the system had gone. Shower head came with 2 restrictors. It has the larger flow one fitted. It is one of those shower heads that mix air in with the water. It has 4 settings but pretty poor on all. Edited June 11, 2021 by pearley Link to comment Share on other sites More sharing options...
Tony Brooks Posted June 11, 2021 Report Share Posted June 11, 2021 (edited) 10 minutes ago, pearley said: PRV is the 4 Bar one fitted by Surecal. Pump on old and new do not have accumulators so pump running all the time after residual pressure in the system had gone. Shower head came with 2 restrictors. It has the larger flow one fitted. It is one of those shower heads that mix air in with the water. It has 4 settings but pretty poor on all. So a water economy shower head. I would try a cheap new one. If the pump runs all the time a higher output one should help. Edited June 11, 2021 by Tony Brooks Link to comment Share on other sites More sharing options...
pearley Posted June 11, 2021 Author Report Share Posted June 11, 2021 Boat came with a cheap shower head but was no different. Will try it with my spare pump when I can find what box it's in. Link to comment Share on other sites More sharing options...
ditchcrawler Posted June 11, 2021 Report Share Posted June 11, 2021 Just now, pearley said: Boat came with a cheap shower head but was no different. Will try it with my spare pump when I can find what box it's in. You could measure how much water is coming out of the shower, just run it into a bucket for 2 minutes. Link to comment Share on other sites More sharing options...
pearley Posted June 11, 2021 Author Report Share Posted June 11, 2021 Just now, ditchcrawler said: You could measure how much water is coming out of the shower, just run it into a bucket for 2 minutes. On my list of things to try. Easy enough to measure 11 litres a minute. Link to comment Share on other sites More sharing options...
ditchcrawler Posted June 11, 2021 Report Share Posted June 11, 2021 1 hour ago, pearley said: On my list of things to try. Easy enough to measure 11 litres a minute. I would suggest trying with the shower, with the shower head removed and from a tap open full bore Link to comment Share on other sites More sharing options...
Featured Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now