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[Auto Addict]

Just had the en-suite re-kitted out.

Previous shower was gravity fed, scalding hot water.

Replace with a Salamander RSP50, all plumbed according to the Salamander spec.

Hot water now only luke warm, any ideas please?

[Marks DTM Calib]

What type of shower?

Thermostatic bar, basic mixer....etc etc

[Auto Addict]

What type of shower?

Thermostatic bar, basic mixer....etc etc

Thermostatic bar.

Hot turned upto max.

Water is scalding out of sink taps.

[Marks DTM Calib]

What solution was used for the hot outlet on the tank?

[Auto Addict]

What solution was used for the hot outlet on the tank?

Essex valve, loft mounted pump.

[Marks DTM Calib]

So, the pump is above water tank?

The RSP50 is for Positive head instals only, it wont do negative head setups

[Marks DTM Calib]

Salamander site hints that it can be done but, you need an anti-gravity loop at the tank outlet and air vents at the highest points to allow bleeding

[Auto Addict]

Just checked, they haven't fitted an anti gravity loop!

I'll get them back!

Thanks Mark

[Marks DTM Calib]

Just checked, they haven't fitted an anti gravity loop!

I'll get them back!

Thanks Mark

Did they fit the bleed points in the loft?

If so then bleed the system, set the bar valve to max hot (sometimes you have to pop the hot adjustment nob off to do this as there is a built in stop) and run the system to purge any air.

[Auto Addict]

Just checked, they haven't fitted an anti gravity loop!

I'll get them back!

Thanks Mark

Did they fit the bleed points in the loft?

If so then bleed the system, set the bar valve to max hot (sometimes you have to pop the hot adjustment nob off to do this as there is a built in stop) and run the system to purge any air.

I'll query that with them, when they return.

Would the anti-gravity loop make much difference?

[Marks DTM Calib]

Its main purprose is to stop hot water gravitating up to the pump when its not running but it also reduces the potential for air to get into the pump system.

I suspect you have air in the system but, the install does not meet the requirements of the pump supplier so a further issue is present.

Also, the feed pipes should be in 22mm pipe (and idealy 22m to as close as possible to the valve also)

Sounds like you have fallen foul of the 'plumber knows best' syndrome 

[Kevin Wood]

Another thing worth mentioning is that sometimes those style of mixer need calibrating as they are installed - basically, as Mark hints at, the knob needs to be correctly positioned on the valve shaft, so that the stops that limit travel cover the correct temperature range. It could simply be that you can't turn it far enough to get a decent temperature, but get them back to sort out the rest of it anyway.

[SIR Philbutt]

Also check the hot and cold supplies go to the hot and cold inlet of the mixer, they are specific.

Sounds a bit daft but I did this once by mistake and the mixer would only run warm, took me aaaages to figure out

HTH Phil

[Auto Addict]

Checked the bleed valves in the loft, no air.

Would the gravity loop make all that much difference?

[Marks DTM Calib]

Checked the bleed valves in the loft, no air.

Would the gravity loop make all that much difference?

It means the manufacturer will honour the guarantee if there is an issue.

Did they not check the operation after it was fitted?