Been noticing a drop off in hot water flow or pressure in the kitchen, it's getting quite slow now, time for some investigation last night.
50 year old 'open vented ?' system with a hot water tank. It's been on my mind what condition the tank is in, scale deposits etc.
Tap insert removed, nothing to see there.
Aerator removed, ditto.
No check or service valves valves to get clogged up.
Other taps checked, old style simple taps seem fine, bath and sink mixers...not bad but maybe should have a bit better flow, not sure.
Air lock ? Tried the old block the tap spout, turn on the cold and hot for 10 seconds, allowing the cold water to divert up the hot pipework, in doing so, it's supposed to purge any air out.
A little better but soon dropped off again after a few seconds.
Tried for longer , 30 seconds, seemed the same outcome. Enough, time for bed.
This morning...while it's not brilliant, it definately is better,
The system is 50 years old, the boilers 25 years old. This next spring / summer, I think it's time to give it all a spruce up and spend a little money on it.