In and Out head ( 1190 ) was D1220 and now Newer MFG Part Number D1400 ( 1191 ) is made to connect using Clack Adapters ( REQUIRED )and can also be used with the By Pass Valve made for the Clack WS1 Valve and other "brands" that use the Clack type of valve under their private label.
This head is threaded, and fits the standard 2 1/2" x 8 NPT tanks used with Fleck, Autotrol, Erie, Rainsoft, Clack, and others.You NEED a set of Clack Adapters
as listed as Related Products to be able to connect to water lines.
And can also be used with the Clack By Pass, V3006
( then the adapters connect to the water lines ).
This head is designed to be used on simple In and Out filter tanks ( such as carbon tank or acid neutralizer tank ). This is not the FILL PORT version ( C1190FP ).
Can be used as Down Flow or Up Flow. Uses 1.05" distributor pipe size ( bottom distributor MD1236 can be used to make a Riser Pipe ).
Accepts the 23D1203 twist on ( snap on ) Top ( upper ) Distributor.
Manufacturer Information = https://clackvalves.net/files/8313/8765/9873/In-Out_Heads.pdf