[Mike #1]

Yesterday the pressure was dropping as though i had air in the system the tank was half full at one stage and i worked for an hour with good pressure on the same job .

Then the pressure just dropped went back to truck and disconnected from reel and sure enough it was like their was air in all connections are are tight and well fitted just puzzled .

Going to change outlets on Pump Box incase O rings have worn .  If not i am totally puzzled pump has been fine for over 2 yrs  and yes the battery has a good charge . Mike

[Dave Willis]

Strainer clean?

Good battery?

[Mike #1]

Yip i check it on a regular basis . Mike

[SPE]

what pump is it ?

[H20cleaning]

Could be the pressure swich causing the pump to cut out to early and not puh enough water through.
I helped a lad with a similar problem few weeks ago, maplins sell almost identicle pressure switches for £3.00 and they work the same buy a couple

[DeLuce]

Or could it be that the controller needs recalibration because of a drop in temperature? Might be worth a shot Mike, easy enough to do, if you use a controller that is.

[Mike #1]

Shurflo 100 psi pump . Mike

[Ian Sheppard]

It may be worth checking the wiring for any damage or worn connectors. In particular between the battery and pump. and faulty or damaged connections will reduce the current available to the pump. Also could be pump motor brushes are worn or full of dust.
Anything that reduces current available to the pump will effect its efficiency

[Mike #1]

All sorted changed connectors on inlet and outlet on pumpbox and all good the pressure dropped on ground fllor windows . Mike

[Smudger]

Sounds like battery losing charge to me are you connected to the van battery if so work with the van running and see if the flow is ok

Darran

[Mike #1]

It is an independant Pump Box in the back of an L200. The problem first happened after about 6hrs on Tuesday .

Then was fine all Wednesday than only played up in the last 15 mins before i finished yesterday and been fine today ,

The battery is about 8 months old a 60ah from Halfords i charge it every 8-9 days . Mike

[Nick_Thompson]

Years ago, after experiencing a number of short lived 12v leisure batteries, a very nice chap from Lucas informed me that leisure batteries should never be discharged pasted 70% of their capacity otherwise they wont reach their full life potential.

[Mike #1]

Fully charged mine reads 12.7 ,  I normally put mine on charge when it reads about 11.7 .

I believe a fully discharged battery has a lower reading , Normally a pressure drops a bit so i normally stick mine on charge when i notice a pressure drop.

[Smudger]

Maybe wrong but it should be more than 12.7

If your confident that it's not the battery and don't want prove it by wiring it to another battery or the van then look for loose or corroded connection

I had this years ago and the actual in line fuse was corroded causing intermittent supply.

As as before I'd bet money on the battery.

On one of our vans the flow will drop when the voltage shows anything under 12
When doing large jobs without moving for 3+ hours I need to run the van because the batt won't hold the charge over that time

Darran

[andyM]

My fully charged leisure battery reads 13.1 volts.

[stevieg]

I pray for the day when somebody invents an alternative to pumps and batteries!!!!!!!!!!!!

[Mike #1]

Connections are all shiny bright , the thing is with the pump box i have it has the threaded hozelock connector's the type that we all have on our outside tap at home to enable to connect hose with a hozelock fitting .


So over time the O rings wear under the pressure when the pump is in DE  and this allows air in to the system it has been over 18 months since i last changed them  but i thought it could be something else . Mike