The Castair CTM is a carry tank manifold with an integrated 150 PSI safety valve. It is designed for portable carry tank setups — the manifold that sits on top of a portable air tank and provides the regulated output connections, gauge port, and safety relief in a single assembly. If you run a portable tank for tire inflation, blowguns, or spot tasks away from the main shop compressor, the CTM gives you a properly rated manifold rather than cobbling together individual fittings.
What the CTM Does
A carry tank manifold consolidates the connections on a portable air tank into one body: air inlet from the tank, outlet to your hose or tool, and a factory-set safety valve to vent if pressure exceeds the rated limit. The CTM's 150 PSI safety valve rating matches the typical working pressure of portable carry tanks used in automotive and light-duty shop applications.
Key Features
- Type: Carry tank manifold — for portable air tanks
- Safety Valve: Integrated, factory-set at 150 PSI
- Part Number: CTM
- Manufacturer: Castair (Cast Air, Inc.) — Spicer, Minnesota
- Application: Portable carry tanks for shop and field use
CTM vs. ACM — Which Manifold Do You Need?
Castair makes two tank manifolds. Selecting the right one matters:
- ACM — Air Compressor Manifold with 150 PSI safety valve. Designed for stationary air compressor tanks. The ACM connects to a compressor tank and handles the higher duty cycle of a machine that cycles on and off throughout the day.
- CTM — Carry Tank Manifold with 150 PSI safety valve. Designed specifically for portable carry tanks. The CTM is sized and configured for the smaller tank ports and lighter-duty use of a portable tank that gets filled and carried to the work area.
If you are replacing a manifold on a stationary shop compressor, you likely need the ACM. If you are building or repairing a portable carry tank, the CTM is the correct part.
When a Shop Needs This
Carry tank manifolds wear out from repeated connection cycles, thread damage, or a safety valve that no longer holds proper pressure. The CTM is the replacement when:
- The existing manifold leaks at the body or ports
- The safety valve vents prematurely or fails to vent at 150 PSI
- You are building a new portable carry tank from components
- You need to add a gauge or outlet connection to an existing tank and want a proper manifold rather than individual fittings
Technical Specifications
- Manufacturer: Castair (Cast Air, Inc.) — Spicer, Minnesota
- Part Number: CTM
- Type: Carry tank manifold
- Safety Valve Rating: 150 PSI
- Application: Portable carry air tanks
- Category: Accessories — Controls / Tank Manifolds
Note: Specific port sizes and thread configurations were not available from the manufacturer page at time of writing. Contact us at 866-217-0063 to confirm fitment for your tank before ordering.
Why Buy From Air Compressor Factory Direct?
We stock Castair manifolds, valves, and fittings alongside their full compressor lineup. A replacement manifold is not the kind of part you want to guess on — the wrong safety valve rating on a pressurized tank is a safety issue, not just an inconvenience. Call us and we will confirm the CTM is the right part for your tank before you order. Free shipping on qualifying orders, free tech support, full manufacturer warranty on everything we sell.
Call 866-217-0063 for quick answers and help!
