Reduced / low hot water pressure.

[ndsmith]

I have been to my mates house tonight after he has been moaning about real low hot water pressure.

His pressure in kitchen tap is shocking, just a real slow run, his bath and basin pressure is also really low but not as low as I his kitchen.
I have come away really scratching my head as to why, the header tank is clear, ballvalve is working fine. The cold feed is good to the cylinder and the cylinder is producing hot water into a good clean 22mm pipe yetrecently the pressure has just gone!

Anyone got any advice for me on this one!?

 

[diamondgas]

What kind of head of water we talking here ndsmith?

 

[ManchesterGas]

Air lock, flexi's to tap, iso valves?

 

[mountainman]

Air lock, flexi's to tap, iso valves?

Decomposed pigeon in tank drawn into supply blocking up taps.
Don't laugh, I've seen it!

 

[on31ll]

Work recently done in the road ? Or nearby on mains ? Whats his cold pressure like ?

 

[jtsplumbing]

Sounds as if somthing is blocking hot water leaveing cylinder, have a look at top fitting could be full of crudd.

 

[lbp plg & htg]

Does the flow from the HOT WATER outlet fall completely? Had the same on a cylinder i fitted 12 months ago and last week the customer decided to start hanging towels on the pipework and had somehow bent the pipe down creating an airlock.

 

[ndsmith]

I've checked for a pigeon or something like, tank is clear.
It is all rigid pipe work to taps, checked iso valves aren't slightly off and it has got a good head of water.

This is why it's stumping me, all obvious causes are clear. I haven't checked the hot water leaving the cylinder, might give that a whirl today!

 

[merv]

How long has this been going on? Did the reduced water flow happen suddenly or over the coarse of time?

 

[dave1]

I agree check outlet on top of cylinder, if it's a hard water area could be scaled up.

 

[merv]

I would go with back feeding it from the washing machine valves !

 

[merv]

When I've taken cylinders out sometimes, the outlet and cold inlet has been the size of a pea due to scale!!