[Tony Osborne]

Here is a video of my porty in action. As you can see it sits at 450 -500 psi. The pressure drop is when the wand trigger is pressed for a couple of seconds. It then climbs again until trigger is pressed again. While i expect some drop this seems like a lot.
Any thoughts or opinions would be welcome. Thanks.

[Tony Osborne]

video is too large I will edit and add later today!!!

[scott johns]

how much is it dropping you should expect quite a bit if you working at those pressures why don't
you try at 250psi and see if it drops same percentage?

[John Kelly]

Could be a number of things. Blocked filter or kink in supply hose to pump. If your jets are large or worn on the wand then they are offering no resistance to the pump so will register less pressure.

[Tony Osborne]

On that note John would the type of wand I am using make a difference.?

I am using my prochem 2 jet wand from the TM. It is farely old now so could probably do with a service.

[Kinver_Clean]

The 450 is a static pressure with no flow.
The pump is able to supply a certain amount of lt/min at a cetain pressure.
The jets will allow a certain amount of lt/ min at a certain pressure.
As the jet size is constant then the pressure will adjust to balance the flow to the pump output.
In other words the pump cannot supply enough flow to maintain the pressure at 450.
This is entirely normal and does not indicate a fault.
In my 30 yr experience 200 is the maximum I would put on a carpet- I used aound 120-140 on heavy soiling and around 100 on normal.