J Pump Union Fits J Pump Unions Only See the picture with an Example of the Pump it fits.. 2" Street Glueable Side measures 2 3/8" OD or 1 1/2" Slip Glueable Side measures 1 7/8" ID For the Video with information about this part search YouTube for: J Pump Union & Wet End Information How To The Spa Guy NOTE: This is a very Rare Pump union so if your pump does not have a beveled surface that the union screws to and it is flat this is not the correct one.. Look for a 2" Pump Union that measures almost the same as this one.. NOTE: This Union is found very rarely so DO NOT order this union unless you are sure.. NOTE: This Union is found very rarely so DO NOT order this union unless you are sure.. Most likely you need a standard 2" Pump Union which measures close to this union so please look at the photos and be sure before ordering or send us photos so we can help you... This union is not a flat it is a beveled style.. Look at the photo examples in this listing.. You are purchasing Jacuzzi J Pump Style Pump Union that can be used on 1 1/2" or 2" Plumbing systems. This union can receive a 1 1/2" plumbing part inside the back of the union or a 2" Plumbing part glued to the outside of the back of the Union. The Union recieves a 1 1/2" or 2" pipe or fitting on one side and then Screws to a Jacuzzi Brand J Pump Style Wetend(Pump) Threaded Part. Don't be confused we also offer a Pump union that is 2" and the threads measure tha same across but they will not fit each other. This Union fits a Wet End where the threads are 3" across and it has a beveled mating surface where the standard 2" union measures 3" but has a flat mating surface. If your plumbing is 1 1/2" or 2" and your Pump Wetend is a Jacuzzi J Style this part is correct. Note: This pump can be found in other brand hot tubs that are not names Jacuzzi like Blue Ridge, Gatsby, White Springs and many others so look at the pictures and be sure before ordering. NOTE: This is a very Rare Pump union so if your pump does not have a beveled surface that the union screws to and it is flat this is not the correct one.. Look for a 2" Pump Union that measures almost the same as this one..