What are the Dimensions of SMI replacement Check Valve # SM99909
Updated 05/10/2018 | Published 05/09/2018 >
Products Featured in This Question
Question:
What is the O.D. on both ends...do you carry 1/2inch O.D. check valves?
asked by: Alex
Expert Reply:
I measured the Replacement Check Valve for SMI Supplemental Braking Systems # SM99909 for you. The overall diameter at the barbs for each end is 0.42 inches. The more narrow parts at the base have a diameter of 0.37 inches.
The center, widest section is 0.76 inches in diameter. The overall length is 1.66 inches. This valve was designed to work with the Air Force One SM99202 or # SM99243 and Stay-IN-Play Duo # SM99251. So if you have one of these systems this is the correct replacement.
If you have the Roadmaster InvisiBrake, # RM-98700, then you would instead need # RM-452141.
Product Page this Question was Asked From
Replacement Check Valve for Demco SBS Supplemental Braking Systems
- Accessories and Parts
- Flat Tow Brake System
- Valves
- Demco
more information >
Continue Researching
- Video: Detailed Breakdown of the Replacement Check Valve for Demco SBS Supplemental Braking Systems
- Shop: Replacement Check Valve for Demco SBS Supplemental Braking Systems
- Shop: Replacement 3/8" Vacuum Check Valve for Roadmaster InvisiBrake and Second Vehicle Kit
- Q&A: Troubleshooting A Hard Brake Pedal After Flat Towing A Jeep With Demco Air Force One
- Q&A: Correct Replacement Check Valve for a Demco SBS Air Force One
- Shop: Vehicle Tow Bar Brake System
- Video: Demco SBS Wireless Coachlink Installation - 2019 Newmar Ventana Motorhome
- Video: All About the Pollak 6-Pole, Round Pin, Plastic Trailer Wiring Socket w/ Rubber Boot
- Article: Trailer Wiring Diagrams
- Search Results: demco
- Search Results: wireless coach link
- Shop: Demco Wireless Coachlink Braking Monitor for Flat Tow Brake Systems
- Shop: Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Wireless Monitoring - Proportional
- Search Results: camco rhino rv sewer adapter pro locking elbow 39730
- Q&A: How to Wire a 6 Pole Round Trailer End Plug
- Search Results: long bracket
- Shop: Pollak 6-Pole, Round Pin, Plastic Wiring Socket w/ Rubber Boot - Vehicle End
- Shop: Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End
- Shop: Pollak Connector Bracket for 4-, 5- and 6-Pole Trailer Connector Sockets
- Search Results: air force one
- Search Results: air force one parts
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Wiring
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Video: Firestone Ride-Rite Air Bags with Easy Mount Compressor Feature Breakdown
- Shop: Base Plate for Tow Bar


