4" Bulkhead (5 3/4" Hole Size) - Hex Nut (Double Washer)

TotalFount 4" pond liner bulkhead fitting, hex nut with double washer — through-liner fitting with dual-washer seal for watertight pipe penetrations in EPDM and PVC pond liners.
Overview The TotalFount double-washer hex-nut bulkhead provides an enhanced seal for demanding pond liner penetrations. The two-washer configuration applies even clamping pressure across both faces of the liner, accommodating slight liner thickness variations and providing greater resistance to hydrostatic pressure than single-washer designs. A 5-3/4" hole is required. The hex-nut format allows tightening with a standard open-end wrench for consistent, measured torque, reducing the risk of under- or over-tightening that can cause leaks or liner damage. Suitable for high-flow applications including skimmer and bottom-drain connections in larger pond installations.
Specifications

Pipe Size	4"
Required Hole Size	5-3/4"
Connection Type	Slip-fit (solvent-weld)
Nut Style	Hex nut with double washer
Compatible Liner	EPDM, PVC, RPE
Part No.	TF-BH040-DW