The Castair RDDM is an accessory for Castair RDD series refrigerated compressed air dryers. Based on the M suffix in the part number, this component is a manifold or mounting kit — either a bypass manifold assembly for servicing the dryer without shutting down the compressor, or a mounting kit for integrating the dryer into the compressor installation. Castair offers similar bypass and mounting hardware for the RD series (the #DM75 and #DP100 kits), and the RDDM serves the equivalent function for the RDD series dryers.
A bypass manifold is a practical addition to any refrigerated dryer installation. It allows you to isolate and bypass the dryer for service, refrigerant recharge, or component replacement without shutting down your air system — important in production environments where the compressor cannot be taken offline during business hours. Contact us at 866-217-0063 to confirm whether the RDDM is a manifold kit, mount kit, or another accessory for your specific RDD model.
Why a Bypass Manifold Matters in a Shop Installation
- Service without shutdown: Isolate the dryer for maintenance while the compressor continues supplying air to the shop — critical for busy shops that cannot afford downtime during a dryer service call.
- Refrigerant recharge access: The dryer can be bypassed while the refrigerant circuit is serviced, without depressurizing the entire air system.
- Winter bypass option: In some installations, the dryer is bypassed during summer months or during specific processes where dew point matters less — a bypass manifold makes this practical.
Compatible Equipment
- Castair RDD series refrigerated compressed air dryers (RDD40, RDD50, RDD80 series)
- Confirm exact compatibility with your RDD model by calling 866-217-0063
What's in the Box
- Castair RDDM manifold/mounting accessory kit
Full contents, connection sizes, and installation instructions available by contacting us. This is a field-installed accessory designed for use with Castair RDD series dryers.
Technical Specifications
- Part Number: RDDM
- Manufacturer: Castair (Cast Air, Inc.)
- Application: Castair RDD series refrigerated compressed air dryers
- Component type: Manifold or mounting accessory
- Connection sizes and dimensions: Contact us for full specifications — 866-217-0063
Why Buy From Air Compressor Factory Direct?
We stock Castair accessories and can confirm which RDDM configuration fits your RDD dryer and installation. If you are building out a full compressed air treatment system — dryer, bypass manifold, pre-filter, aftercooler — we can spec the complete setup for your shop. Free shipping on qualifying orders, free pre-sale technical support, genuine Castair parts.
Call 866-217-0063 for quick answers and help!
