| Comparison : |
Item # 1 1/2-09-577-FNPT X FNPT, 09-577 Check Valve, 1 1/2 FxF NPT UL
Item # 1 1/2-09-575-MNPT X FNPT, 09-575 Check Valve, 1 1/2 MxF NPT UL
Item # 1 1/2-09-574-MNPT X GRV, 09-574 Check Vlv 1 1/2 MNPTxGRV UL
Item # 1 1/2-09-576-GRV X GRV, 09-576 Check Valve, 1 1/2 GRV UL
Item # 2-09-570-MNPT X FNPT, 09-570 Chk Vlv, 2 MNPTxFNPT UL/ULC/FM
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