You can find the right flow direction engraved on the check valve.

Please refer to our broad assortment of fittings to adapt to a variety of threads.

Product no	Product description	DN	Working pressure [bar]	Construction form	Thread + standard	Thread [GA]	Connection type 1	Connection type 2	Thread [G1]	Thread [G2]	Stock
RV-VU04AGR	RV-VU-ARG BSP, external thread	6	500	check valves	Whitworth-Pipe thread (BSP), DIN EN ISO 228-1	1/4"	imperial	imperial	G 1/4"	G 1/4"	Available
RV-VU06AGR	RV-VU-ARG BSP, external thread	10	300	check valves	Whitworth-Pipe thread (BSP), DIN EN ISO 228-1	3/8"	imperial	imperial	G 3/8"	G 3/8"	Available
RV-VU08AGR	RV-VU-ARG BSP, external thread	12	350	check valves	Whitworth-Pipe thread (BSP), DIN EN ISO 228-1	1/2"	imperial	imperial	G 1/2"	G 1/2"	Available