[Huck]

I don't know if all DT units have a Surflow brand water filter or not, but mine does.

I had alot of trouble with the O-ring shrinking.

I have always had to cover it with Bag Bomb to get it to stay in the little groove long enough to get it back together.
I had one heck of a time the last time I changed my filter cartridge.

I e-mailed Shurflow and asked if they could send me a couple new O-rings and they did. I had them in a couple of days......FOR FREE!! WOW!!