I have worked with Salamander pumps for years now, and it is a shame to hear some of the comments on this post, If any one suffers issues that are unresolved with there products then feel free to contact me and I will make sure that the outstanding issues are dealt with.
With out knowing the full history the installations mentioned jasonb and seco are spot on, I think that the engineer visiting have missed temperatures that are not stable and are eratic. cylinder stats are not accurate in holding a constant tempreture and the only time I have heard of this issue with plastic impeller centrifugal pumps is due to temperature.
If you are using your emmersion heater as well as your boiler to heat the water up check and change the stat, this is the most likley cause.
For the record Salamander pumps are harder to fit because of there design, but will out perform in flowrate at the same pressure as other competitors and are a hell of a lot quieter.
The offer is there if anyone needs help call me and we will get to the bottom of any issues.
I do not work for Salamander I am Independant and also advise and sell all other brands of pump so I have no reason to be biased.
http://www.salamander-pumps.com/
With out knowing the full history the installations mentioned jasonb and seco are spot on, I think that the engineer visiting have missed temperatures that are not stable and are eratic. cylinder stats are not accurate in holding a constant tempreture and the only time I have heard of this issue with plastic impeller centrifugal pumps is due to temperature.
If you are using your emmersion heater as well as your boiler to heat the water up check and change the stat, this is the most likley cause.
For the record Salamander pumps are harder to fit because of there design, but will out perform in flowrate at the same pressure as other competitors and are a hell of a lot quieter.
The offer is there if anyone needs help call me and we will get to the bottom of any issues.
I do not work for Salamander I am Independant and also advise and sell all other brands of pump so I have no reason to be biased.
http://www.salamander-pumps.com/