Quite often we have requests to make extra-large 4-inch custom HydraSleeves. We have found that adding some diameter and length to our HS-4-2L check valve set up we can make a custom sleeve that can hold 1.3 liters per foot. So if we make one that is 5-feet long, it holds 6.5 liters. When full, it makes a 3-inch OD HydraSleeve, and it can hold quite a bit more in one HydrSleeve than any of our standard units.
Granted, these are quite heavy. They weigh 15 pounds when full, but sometimes a set up like this is the best solution.
At the time we didn't have a top weight that would compress this unit close the bottom of the well. So, Kent went to work and designed a stainless ring to fit over the top of our standard 4-inch top weight. Together these units will compress a custom extra-large 4-inch HydraSleeve to within 20 inches of the bottom. So the sample collection process would begin at 20 inches and continue for 5 feet above that location, basically allowing for a 6.5 liter sample to be collected from a 7 foot saturated screen in a 4-inch Shedule 40 well. If you have schedule 80 you will need a longer screen because it won't compress as far.
Basically we have added a stainless steel ring: 
To the standard 4-inch top weight: 
The ring rests on the ledge that protrudes from the 4-inch top weight and it is held in place with gravity and the spring clip also keeps it from coming off once assembled.
Together they weigh approximately 44 ounces. The ring adds an additional 20 ounces to the already 24 ounce top weight.
Components will be ordered separately as follows:
Custom 4-inch HydraSleeve $55.00 - must call to order, custom units not available online.
Standard 4-inch Top Weight with spring clip $65.00
4-inch Heavy Ring $45.00 - call to order, prototype quantities only available at the moment. They will be added to the website when production quantities are available.
Please give us a call or This email address is being protected from spambots. You need JavaScript enabled to view it.f you would like more information 800-996-2225.