Half Union, 1-1/2″, with O-Ring|122243B

🔧 What this part is

Waterco Half Union, 1-1/2", with O-Ring, part number 122243B. A union lets you disconnect a pump, heater or filter without cutting pipe.

Size as listed: 1-1/2"; connections: union.

✅ Check before you order

• Measure the part you are replacing – this one is listed as 1-1/2".
• The connections have to match: union.
• The number on the old part should read 122243B, or the maker’s equivalent.
• Not sure? Send us a photo of the old part and any number on it, and we will tell you whether this is the one.

🔧 Exploded diagram and parts

This part belongs to the Waterco Top Mount Multiport Valve – 1-1/2" Model assembly. Everything listed below is something we stock for it, and the numbers match the diagram.

No.		Part	Our part number	Availability	Price
4		Cover, Waterco 1-1/2" Top/Side Mount Valves	621453	Available to order	$24.40	Add to cart
5		Square Ring, Waterco Top/Side Mount Valve, Cover	621454	3 in stock	$22.79	Add to cart
6		Bolt, Waterco 1-1/2" and 2" Top/Side Mount Valves	621464	Available to order	$3.78	Add to cart
7		Gasket, Waterco Top/Side Mount, Spring, 1"ID, 1-11/16"OD	621455	Available to order	$11.70	Add to cart
8		Spring, Waterco 1-1/2" Top/Side Mount Valves	621456	Available to order	$46.50	Add to cart
10		Rotor, Waterco 1-1/2" Top/Side Mount Valves	621458	1 in stock	$88.41	Add to cart
11		Gasket, Waterco 1-1/2" Top/Side Mount, 5-9/16"OD, 5 Spokes	621460	16 in stock	$67.15	Add to cart
13		Air Release, Waterco Filter/Valve, with O-Ring	620221	28 in stock	$15.35	Add to cart
15		Sight Glass, Waterco 1-1/2" Top/Side Mount Valves	621463	Available to order	$33.37	Add to cart

Parts that go with this

	Part	Our part number	Availability	Price
	Tool, Pool Tool, O-Ring Pick	134	18 in stock	$11.23	Add to cart
	Silicone Based Lubricant 1oz 00150	00150	343 in stock	$5.26	Add to cart