Winterizing check valve system

Details Winterizing check valve system Winterizing check valve system

1995-05-17

1996-11-26

Recla, Henry J.

Baths, closets, sinks, and spittoons

Pool type

Construction details

4496, 137539, E04H 414

Patent

active

055772749

ABSTRACT:
A winterizing check valve system comprised of a cylindrical check valve having a hollow securement portion and a housing portion. The hollow securement portion is adapted for coupling with an end of a return line for a swimming pool. The housing portion is adapted for securement to the hollow securement portion. The housing portion has a spring therein. The housing portion has a ball coupled therein adjacent to the spring. The housing portion has a plurality of openings therein. The check valve system has an adapter plug having a first end and a second end. The adapter plug has an opening formed therethrough. The first end is adapted to couple with an opposing end of the return line for the swimming pool. The second end is adapted to couple with a compressor.

REFERENCES:
patent: 619705 (1899-02-01), Knupp
patent: 1659047 (1928-02-01), Quinn
patent: 3530511 (1970-09-01), Berg et al.
patent: 4154679 (1979-05-01), Farage
patent: 4346484 (1982-08-01), Martin
patent: 4368550 (1983-01-01), Stevens
patent: 4818389 (1989-04-01), Tobias et al.

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