Yes that was my thought, tried water around the valve and no bubbles or any sign of any air leak. checked it over the last four days and no loss of pressure.
not going too far next week or will watch it carefully, may take it off and get it checked. it is about right for the week, with new pump needed for the toilet
sticking pump on the kitchen sink and a new tap fitted to the wash basin in the toilet, replaced old tap with one minus the shower extension, much better easier to fill tank in cupboard, and never used it as a shower tap.