[davids3511]

I am not certain how to set my van up. Should the pump be pushing or pulling?

[Wayne Thomas]

pushing through a di

[Alex Wingrove]

pull,

that way the pressure wont build up in the di, and damage it inside, and also any bits of resin that sometime come out will get caught in the strainer before it goes through the pump

[Nathanael Jones]

Push,...

The DI should always be after the pump. They are made to take the pressure,.. mine have labels on the side saying they're rated to 250 PSI if I remember right.

This reduces strain on the pump and helps prevent airlocks.

[Alex Wingrove]

pull!

[[GQC] Tim]

pull!

He just explained why you should have it on push.

[stevieg]

pump sucks water from tank ,pushes through di ,then no chance of any resin getting in the pump.

[davids3511]

So we have 2 saying pull and 3 saying push!

[Nathanael Jones]

Start a poll David!!

Or as Alex G,.. He always knows the answer!

[Bazzy1999]

Push...

[Wayne Thomas]

pull,

that way the pressure wont build up in the di, and damage it inside, and also any bits of resin that sometime come out will get caught in the strainer before it goes through the pump

Pulling would clog up your strainer quicker than necessary with loose resin seeping from the di and put a strain on your pump. If your strainer gets partially clogged it would also slow down the flow of water after your pump so you would have to turn your dial up on your varistream if you have one fitted which in turn would drain your battery quicker and your battery would need more charging to top up to the same amperage which in turn would shorten the life of your battery.
How do you manage with bits of dirt on the glass which gets in the bristles of your brush whilst you're cleaning the glass?

[LWC]

how do you put 2 di vessels in with 2 pumps if the pumps were to push out ?

[Xline Systems]

how do you put 2 di vessels in with 2 pumps if the pumps were to push out ?

i am fitting a new system in one of my vans today 1000ltr with 2 pumps and 2 di's
will post some pics later

[davids3511]

Spoke to Varitech a little while ago. They said that the pump needs to push through the DI. Apparantly the pumps are positive displacement pumps and they don't mind a bit of pressure but do not like suction at all. Sucking through the DI will cause suction and that is not good for the pump.

[Captain Scarlet]

push, anybody thats says otherwise is wrong, Luke

[sunshine windows]

sound like the bloody hokey cokey. push pull push pull shake it all about. lol

[Alex Wingrove]

pull,

that way the pressure wont build up in the di, and damage it inside, and also any bits of resin that sometime come out will get caught in the strainer before it goes through the pump

Pulling would clog up your strainer quicker than necessary with loose resin seeping from the di and put a strain on your pump. If your strainer gets partially clogged it would also slow down the flow of water after your pump so you would have to turn your dial up on your varistream if you have one fitted which in turn would drain your battery quicker and your battery would need more charging to top up to the same amperage which in turn would shorten the life of your battery.
How do you manage with bits of dirt on the glass which gets in the bristles of your brush whilst you're cleaning the glass?

i thought that was exactly what the strainer was for, to catch debris before you fire it at the glass

[[GQC] Tim]

Spoke to Varitech a little while ago. They said that the pump needs to push through the DI. Apparantly the pumps are positive displacement pumps and they don't mind a bit of pressure but do not like suction at all. Sucking through the DI will cause suction and that is not good for the pump.

Bingo.

Alex Wingrove take notice. 

[Moderator David@stives]

Push

If you pull you will be liable to air locks esecially if you run out of water occassionally.

It is easy to prime your system if you are pulling water just from the tank with a small hose rather than through a filter system.

[S.A.J]

Mine is set by (by Varitech) to push through the DI.