Gas heater flush
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Gas heater flush
Just bought a house with an old looking tankless propane water heater. It heats up fine but the flow is weak. Its marked up as an 11L boiler but, after measuring the flow from various points, one directly from the boiler outlet, the best i can get is about 5liters a minute. Were in a particularly hard water area and i suspect a limescale build up. Is it possible to descale these boilers?
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Re: Gas heater flush
The flow rate is very dependant on how much the water temp needs to be, so 11l is probably measure on some favourable inlet water temperature. This time of year the input water is pretty cold so you'll see a much lower flow rate for a given tap temperature than you will in the summer
We have a err, b***** cant recall the make right now. It's been in for 11 years and still works like a charm. I do havwe cal filters in my water supply line, and i flush the heater every year with a product called descal.
I hear that you can get a plumber in to do it for you, at a price.
We have a err, b***** cant recall the make right now. It's been in for 11 years and still works like a charm. I do havwe cal filters in my water supply line, and i flush the heater every year with a product called descal.
I hear that you can get a plumber in to do it for you, at a price.
Regards
Bob
Bob
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Re: Gas heater flush
Cheers Bob, i think i understand the link between the optimum flow rate and delivery temp but it seems a big drop to less than half. Almost every isolation valve in the house is scaled to hell so i guess i will contact a plumber for a flush, and maybe an in line descaler like yours. Thanks for the advice.
Bob
Bob
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Re: Gas heater flush
Been a power cut evening, grrrrrr
It simple to flush the heater, or even your entire house. What i do is simple, although it took a few years for tje penny to drop..
Turn off your water pump, or supply if you don't have a pump.
Remove the cal filter cartridge fom the filter body. If you don't have any inline filters they are cheap to buy and easybto fit.
Open a hot tap somewhere in the house.
Half fill the filter bowl with descal.
Turn the water pump back on.
When dirty water comes out of the hot tap, turn the tap off.
Leave for 10 minutes or so
Turn hot tap back on and run until clean water comes out.
Replace cal filter cartridge.
Job done.
You can of course repeat with other hot and cold taps to decal the pipes if you feel the need/have time.
It simple to flush the heater, or even your entire house. What i do is simple, although it took a few years for tje penny to drop..
Turn off your water pump, or supply if you don't have a pump.
Remove the cal filter cartridge fom the filter body. If you don't have any inline filters they are cheap to buy and easybto fit.
Open a hot tap somewhere in the house.
Half fill the filter bowl with descal.
Turn the water pump back on.
When dirty water comes out of the hot tap, turn the tap off.
Leave for 10 minutes or so
Turn hot tap back on and run until clean water comes out.
Replace cal filter cartridge.
Job done.
You can of course repeat with other hot and cold taps to decal the pipes if you feel the need/have time.
Regards
Bob
Bob
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- Andalucia.com Amigo
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Re: Gas heater flush
Bob, Thanks again. we dont have a pup but good pressure fro town water supply. I guess the first step is to fit a filter unit into the supply line. Anther question though, will a descale filter unit reduce the supply pressure?
- Enrique
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Re: Gas heater flush
Hi,
I'm guessing you have done the basics.......changing the tap filters.............
I'm guessing you have done the basics.......changing the tap filters.............
All my best learning experiences start with a problem I need to solve.
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Re: Gas heater flush
bbobandannie wrote:Bob, Thanks again. we dont have a pup but good pressure fro town water supply. I guess the first step is to fit a filter unit into the supply line. Anther question though, will a descale filter unit reduce the supply pressure?
Doesnt appear to do so significantly, and i have two cal filters and a carbon filter in line after my pump. The cal filter cartridges are full of loosly packed crystals and shouldn't offer much resistance to water flow.
You could always fit the filter housing and not insert a cartridge using it simply as a means to inject descal into the system. They only cost 10-15euros and a couple of pipe fittings.
Regards
Bob
Bob
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- Andalucia.com Amigo
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Re: Gas heater flush
Brilliant idea, will get straight onto it
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