Check Valves - Compression Fitting Style CTD style

Check Valves - Compression Fitting Style

Check Valves - Compression Fitting Style

Model/Part Number: CTD style

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The CTD has a male compression inlet and a male outlet. Inlets range from 3/8" to 3/4". Outlets range from 3/8" to 1" (MPT). Has optional 1/8" unloader port on hex section. Check valves control the flow of air into the receiver tank. When the compressor reaches unload pressure the check valves closes, preventing the backflow of air from the receiver tank into the discharge supply line.

To find out what size you need, measure the outside diameter of the supply tube that comes from the pump that goes into your check valve. If it measures 3/8", then this diameter is the first measurement. ie CTD3812 means that the supply tube is 3/8" wide and the 12 means that the tank opening on the other end is a 1/2" pipe thread.

To determine the size of the end that fits into the tank, measure the OD of the threads, then subtract 1/4" because pipe sizes always measure 1/4" over the actual size

Where is my check valve located?


This was a new check valve installed less than a year ago. Due to the tanks not being drained, this check valve failed after less than a year.



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Displaying 16 products

Reference Item Important Info! Old Part # Part or Model Price Image Select Qty Status
5/8" Comp X 1/2" MPT Check Valve 5/8" Compression X 1/2" MPT with 1/8" FPT side portDAC-252CTD5812$19.955/8" Comp X 1/2" MPT Check Valve-
00000Check Valve (CTD1212QR) check valve, 1/2" Comp X 1/2"MPT (CTD1212) with a quick release fitting.CTD1212QR$22.05Check Valve (CTD1212QR)-
00000CTD Check Valve Kit Check Valve Kit includes our most popular (2) compression fitting style check valves: CTD1212 - (1/2" Comp x 1/2" MPT) and CTD3812 - (3/8" Comp x 1/2" MPT). Both have an optional 1/8" unloader port on the hex section.CTDCHECK$40.44CTD Check Valve Kit-
00000Replacement Cold Start ValveReplacement cold start valve.SU3$9.53Replacement Cold Start Valve-
00000Tube FttgQR$6.95Tube Fttg-
001/21/2" Comp X 1/2" MptCTD1212 with 1/8" plug included. CTD1212P$22.851/2" Comp X 1/2" Mpt-
001/21/2" Comp X 3/4" MptCTD1234$27.561/2" Comp X 3/4" Mpt-
001/2Check Valve, 1/2" 1/2" Comp X 1/2" MPT Check Valve. Recommended to replace this if your tank isn't holding pressure or if you're replacing your Pressure Switch!CTD1212$22.23Check Valve, 1/2"-
003/43/4" Comp X 01/2" MptCTD3412$27.56-
Reference Item Important Info! Old Part # Part or Model Price Image
003/43/4" Comp X 1" MptCTD341$41.243/4" Comp X 1" Mpt-
003/43/4" Comp X 3/4" MptCTD3434$27.563/4" Comp X 3/4" Mpt-
003/83/8" Check Valve3/8" Comp X 1/2" MptCTD3812$21.173/8" Check Valve-
003/83/8" Comp X 3/8" MptCTD3838$19.953/8" Comp X 3/8" Mpt-
003/8Check Valve, 1238tamc3/8" male compression by 1/2" NPT male tank threads w/ 1/8" hole for pressure switch line and cold start valve to make starting easier. For the HC4V model. (all years)141-1095CTD3812-P1-SU3$30.55Check Valve, 1238tamc-
05/165/16" Comp X 1/2" MptCTD51612(X)SOL
No Info
0CompConnect, Male Adapter (068-0002)68-4-2$3.86Connect, Male Adapter (068-0002)-

Displaying 16 products

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