PVC fitting manufacturers have developed a useful uniform numbering system to classify fittings by material, inlet types, and inlet sizes. The graphic below illustrates how this system works.

• • A prefix of "1" indicates that the fitting is a barbed poly pipe fitting.
• • If the first number is "4" then the fitting is Sch. 40. Example: 429-010 (typically a white colored fitting)
• • If the first number is "8" then the fitting is Sch. 80. Example: 829-010 (typically a grey colored fitting)
• • The first three numbers indicate the type of fitting and inlet types: For Example Slip Tee (401), FIPT Elbow (408), MIPT x Slip Male Adapter (436), etc. Find out more about inlet types like FIPT, MIPT, Spigot, and Slip in our Irrigation Glossary.
• • The second set of numbers, after the dash, indicate the size. For example a 401-010 is a 1" tee, 406-005 is a 1/2" elbow, 407-101 is a 3/4" x 1/2" slip x thread elbow.

401 Tee: Slip x Slip x Slip	402 Tee: Slip x Slip x FIPT	405 Tee: FIPT x FIPT x FIPT	406 Ell: Slip x Slip
407 Ell: Slip x FIPT	408 Ell: FIPT x FIPT	409 Ell: Spigot x Slip	410 Ell: MIPT x Slip
411 Ell: Spigot x FIPT	412 Ell: MIPT x FIPT	413 Side Outlet: Slip x Slip x Slip	414 Side Outlet: Slip x Slip x FIPT
417 45° Ell: Slip x Slip	420 Cross: Slip x Slip x Slip x Slip	429 Coupler: Slip x Slip	430 Coupler: FIPT x FIPT
434 Riser Extension: FIPT x MIPT	435 Female Adapter: Slip x FIPT	436 Male Adapter: MIPT x Slip	437 Reducer Bushing: Spigot x Slip
438 Reducer Bushing: Spigot x FIPT	439 Reducer Bushing: MIPT x FIPT	447 Cap: Slip	448 Cap: FIPT
449 Plug: Spigot	450 Plug: MIPT	463 Snap Tee: Snap x Slip	464 Snap Tee: Snap x FIPT

Single Size 1/2" -005 3/4" -007 1" -010 1 1/4" -012 1 1/2" -015 2" -020 2 1/2" -025 3" -030 4" -040 5" -050 6" -060 8" -080

Expanding Size 1/2" x 3/4" -074 3/4" x 1" -102 1" x 1 1/4" -132 1" x 1 1/2" -133 1 1/2" x 2" -213 3" x 4" -342

Reducing Size 3/4" x 1/2" -101 1" x 1/2" -130 1" x 3/4" -131 1 1/4" x 1/2" -166 1 1/4" x 3/4" -167 1 1/4" x 1" -168 1 1/2" x 1/2" -209 1 1/2" x 3/4" -210 1 1/2" x 1" -211 1 1/2" x 1 1/4" -212 2" x 1/2" -247 2" x 3/4" -248 2" x 1" -249 2" x 1 1/4" -250

Reducing Size Cont. 2" x 1 1/2" -251 2 1/2" x 1/2" -287 2 1/2" x 3/4" -288 2 1/2" x 1" -289 2 1/2" x 1 1/4" -290 2 1/2" x 1 1/2" -291 2 1/2" x 2" -292 3" x 1/2" -333 3" x 3/4" -334 3" x 1" -335 3" x 1 1/4" -336 3" x 1 1/2" -337 3" x 2" -338