changing bathroom sink jumper valve cause water pressure to drop

[gbullo]

I just changed the jumper valve on a bathroom sink cold tap which was dripping and now the pressure has dropped on both the cold tap and the hot tap paired to it. I have dual sinks and the other still has good pressure.

The old jumper value was brass and I would say original (12 years) the new one I bought from you was 13mm jumper valve.

I have change quite a few over the last year or so and this is the only one to lose pressure

[Noyade]

Hello @gbullo 

I had a similar experience last year after changing a vanity tap washer.

Reduced spout outflow on both hot and cold.

Couldn't fathom it.

Then I discovered the spout had a metal filter at the end. Changing washers disturbed material that got caught and blocked the outflow. Once removed, cleaned and replaced - outflow pressure restored.

Just a pre-wine thought.

Cheers.

[gbullo]

Thanks Noyade

I was going to test that today as both hot and cold were affected pointing to something in the mixer sprout.

I am guessing I need to start with the end attachment on the sprout.

[gbullo]

Clean filter - flow restored