I bought this UNISEAL with the tank-connection materials. My diary specifically records planning holes for three water tanks before finishing the interior surfaces.
I bought One-and-a-Half-Inch UNISEAL Tank Adapter as part of my camper van equipment.
I bought this UNISEAL with the tank-connection materials. My diary specifically records planning holes for three water tanks before finishing the interior surfaces.
A Larger Tank Connection in the Early Plan
I used SketchUp to plan the interior and put body openings ahead of the framing, floor and wall panels.
My Interior Preparation notes included the shower drain and openings for three water tanks in that preparation sequence.
I removed cargo tie-down hardware for later framing mounts and door trim for the later insulation and paneling.
Removing stuck-on residue during the floor cleanup.The cargo floor during my preparation session before sound deadening.
My Takeaway for the Build
My Interior Preparation notes specifically include openings for three water tanks. That makes the tank-wall connection a more useful focus than a general plumbing description. This one-and-a-half-inch UNISEAL purchase uses a flexible seal; the Hayward alternative has a rigid body and nut, while the smaller UNISEAL changes the pipe size.
Product Details And Van-Build Uses
Specification
Product Detail
Nominal Pipe Size
1½ inches
Matching Pipe Outside Diameter
1.900 inches
Hole-Saw Reference
2½ inches
The one-and-a-half-inch UNISEAL uses a larger tank opening than its nominal pipe-size name suggests. Pentair’s U150 table lists the matching pipe outside diameter and the hole-saw size together, which is useful when comparing pipe and tank-wall measurements. The flexible seal surrounds the inserted pipe rather than using the separate body and retaining nut of a conventional bulkhead. For a van tank layout, the opening position, pipe route and room to assemble the joint are connected planning details. The smaller half-inch alternative remains a different pipe size, rather than an interchangeable version of the same connection.
Pentair lists a 2½-inch hole-saw size for U150, used with 1.900-inch outside-diameter pipe.
Alternative products
Two Alternatives to Compare
The Hayward bulkhead uses a rigid body and retaining nut for a one-and-a-half-inch connection. The half-inch UNISEAL is a smaller pipe-penetration option, with a different pipe size and opening geometry.
Product
What distinguishes it
Purchase link
One-and-a-Half-Inch UNISEAL Tank Adapter
Flexible seal for a one-and-a-half-inch pipe penetration.
