RK MAC Upgrade Kit, 2 pc. SS Piston/Connecting Rod Assy, GEN III Piston Seals, Neoprene for CPS TR21/TRS21
Reference: RKMAC-1N
Manufacturer: RK MAC
***Note: Neoprene is for HVAC Applications, not Extraction*** Upgrade your TR21 or TRS21 with RK MAC's easy service 2 piece SS piston design.
Overview
***Note: Neoprene is for HVAC Applications, not Extraction***
Upgrade your TR21 or TRS21 with RK MAC's easy service 2 piece SS piston design. This kit comes with a fully assembled connection rod with the 2 piece piston. You will also get RK MAC's exclusive long life GEN III piston seal and wear band along with other improvements over the original OEMs design. GEN III seals last 700% longer than the OEM seals. This kit utilizes a Neoprene energizing O-ring for refrigerant recovery use.
Fits
CPS TR21 and TRS21 recovery pumps.
Neoprene is for HVAC (refrigerant) use, not extraction. For butane or propane extraction choose the Viton version.
Delivery and pickup
- Ships across Canada and to the USA by Purolator, UPS or FedEx - live rates at checkout.
- Free pickup in Langley, BC.
- We deliver orders of $1000 or more in the Lower Mainland and Fraser Valley ourselves.
| Maker | RK MAC Service |
| Part number | RKMAC-1N |
| Fits | CPS TR21 and TRS21 |
| Seals / O-rings | Neoprene (HVAC, not extraction) |
| Included | connecting rod with 2-piece SS piston (assembled), GEN III piston seal, wear band, Neoprene energizing O-ring |





















