I run my system through Two 11 litre D I vessels, thus getting as much life out of the resin as possible.
The 2 D I's are slightly different, they have a different head, but internally are the same.
When i have D I '1' first then D I '2' every thing is fine, The problem comes when i re fill the spent resin and change places, so the water then flows through D I '2' first then D I'1'.
When i turn my water on, it takes about 2 minutes for the pressure to build up to normal, then when i turn the water off, the water carries on coming out for a few minutes unless i disconnect the reel letting about 3 litres of pure water to gush out.
When it comes to change resin again and i swap D I places, the problem is gone, untill next time a resin change is required.
My father in law runs an identical set up with 2 smaller D I 's, and no probs???
What is going on?
Jason