Specification Brand : American Spa Parts BulletPoint1 : 2 3/4" Outside Diameter BulletPoint2 : 1 15/16" Inside Diameter BulletPoint3 : Fits some Spa Heater Unions BulletPoint4 : See our YouTube Video on this product. Search for "Spa Heater 1 1/2" Split Nut Information How To Hot Tub Parts of America" BulletPoint5 : If You have a Coleman Saluspa this will not fit DO NOT order it!! Color : black ExternallyAssignedProductIdentifier1 : 0740016010036 ExternallyAssignedProductIdentifier2 : 740016010036 ItemName : 1X Hot Tub Spa 1 1/2" Split Nut for Heater Union Video How to * NOT for SALUSPA Blowup tub ItemPackageDimensions_Height : 8.636 centimeters ItemPackageDimensions_Length : 7.112 centimeters ItemPackageDimensions_Width : 7.112 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : swimming-pool-and-spa-replacement-parts ItemTypeName : Filter Valve Spring Manufacturer : American Spa Parts Material : brass ModelName : Filter Valve Spring ModelNumber : ASP20-15204-A4624 NumberOfBoxes : 1 PartNumber : ASP20-15204-A4624 Pattern : Solid PowerSourceType : ac ProductDescription : You are buying a 1 1/2" Heater Split Nut Only which includes the split nut and (2) Screws for use with a 1 1/2" Heater Union. The Heater Flange Split Nut mounts to the heater tube using 2 screws to hold it in place and screws onto the heater threaded union with a gasket between the union and tube. Please see our store for a kit that includes the gasket. If your plumbing is 1 1/2" and your heater is 1 1/2" this part is correct. This version is the second most popular version. 2 x 2 is 1st most popular and 1 1/2" X 2 is 3rd most popular.This part is used in hot tubs to plumb a heater tube to a heater union. PLEASE NOTE: We did a lot of extra work with pictures and measurements so please do your part and measure your old part to be sure it is correct.. This will save us all some time and money.. Thanks.. See our YouTube Video on this product. Search for "Spa Heater 1 1/2" Split Nut Information How To Hot Tub Parts of America" ProductDescription1 : Parts number: SPX0603S SP0740DE ProductDescription2 : Includes 4* Filter Valve Spring ProductDescription3 : Compatible with hayward multiport valves models sp0710, sp0710x, sp0711, sp0712 1-1/2-inch, sp0715, sp0716 2-inch, sp0704, 1-1/2-inch and sp0740de 2-inch hcv20715, sp071620t, sp0710xall, s220t2 ProductSiteLaunchDate : 2016-03-28T18:44:57.691Z Scent : Collar Size : 1 1/2" Style : Modern SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1