Mueller Streamline 3/8" Bi-Flow Heat Pump Filter Drier, 16 Cu In, Braze / Press Fit / Push Fit, RP17391
For heat pump repairs that need more cleanup capacity, the Mueller Streamline RP17391 (model HPP-163) has a 16 cubic inch solid core in a bi-flow shell built for reversing systems. It's part of Mueller's DRYMASTER® FTG x FTG series, so the 3/8" OD fitting-size ends adapt to your job. You can braze it in the same way as a conventional drier, press it into 3/8" press fit fittings such as Streamline ACR Copper Press, or join it with 3/8" push fit fittings. It's rated for R-410A and other common refrigerants and oils, and it's a good fit for service technicians and installers handling larger-charge heat pumps or post-repair cleanup.
When Does a 16 Cu In Heat Pump Drier Make Sense?
Doubling the desiccant volume of the 8 cu in model, the RP17391 gives you more room to absorb moisture and acid and hold debris. That margin matters when a system has been open to air, after a refrigerant leak repair, or when you want a drier that will keep working through the rest of the season.
When choosing between core sizes, consider the system's refrigerant charge, how long the system was open, whether there's evidence of acid or burnout, and the line length. Larger charges and dirtier systems point to this 16 cu in core.
Ideal for: Larger residential and light commercial heat pumps, cleanup after major repairs, and contractors who want one drier for brazed, press, and push installs.
Need a smaller core? The Mueller Streamline 3/8" Bi-Flow Filter Drier 8 Cu In, RP17389 is a more compact option for routine heat pump change-outs on clean systems.
Drier sizing recommendations are general guidelines only. Actual requirements depend on system charge, refrigerant type, contamination level, and service conditions. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Filter Drier | Mueller Streamline RP17391 (HPP-163) DRYMASTER® FTG x FTG Heat Pump Filter Drier |
|---|---|
| Application | Bi-Flow Heat Pump Liquid Line |
| Connection Size | 3/8" OD |
| Connection Type | FTG x FTG: Braze, Press Fit, or Push Fit |
| Desiccant Volume | 16 Cubic Inches |
| Refrigerant | R-410A and Other Commonly Used Refrigerants & Oils |
| Pressure Rating | UL Rated to 700 PSI |
| Operating Temperature | -40°F to 160°F |
| Dimensions | 8.59" Overall Length x 3.11" Shell Diameter |
| Weight | 2.194 lb |
This listing ships one RP17391 high-capacity bi-flow drier. Its larger 3.11" shell holds twice the desiccant of the 8 cu in version but stays only 8.59" long, so it still fits most 3/8" liquid line runs. See the full lineup of Mueller HVAC and refrigeration products at Budget Heating.
Filter Drier Features
RP17391 High-Capacity Bi-Flow Core
- 16 cubic inch solid core, double the RP17389
- Bi-flow filtration in heating and cooling modes
- Traps particulate down to 25 microns
- High-pressure shell rated by UL to 700 PSI
- Works from -40°F up to 160°F
- Compatible with R-410A and common refrigerant oils
Three Ways to Connect
- 3/8" OD FTG x FTG ends sized like copper tube
- Braze it in the same way as a conventional drier
- Designed for Streamline ACR Copper Press fittings
- Accepts 3/8" push fit fittings for tool-free joining
- Press or push installs cut hot-work permits and fire-watch time
- UL/cUL Listed, EU PED and UK PER conforming
Frequently Asked Questions
How much more desiccant does the RP17391 hold than the RP17389?
Twice as much. The RP17391 has a 16 cubic inch core, compared with 8 cubic inches in the RP17389, which gives it more capacity for moisture, acid, and debris.
What is the overall length of the RP17391?
Mueller lists an overall length of 8.59" and a shell diameter of 3.11", so plan for the wider shell when mounting it in tight cabinets.
Is the RP17391 a good choice after opening a heat pump to atmosphere?
Yes. Its larger 16 cu in core suits systems that may have picked up moisture or contamination during repairs, as long as you also follow proper evacuation procedures.
What connection methods work with the RP17391?
Three. You can braze it in like a standard drier, press it into Streamline ACR Copper Press fittings, or connect it with 3/8" push fit fittings.
What pressure rating does the RP17391 carry?
It is UL rated to 700 PSI, with high-pressure shell and connections suitable for R-410A systems.
Can I get a 16 cu in bi-flow drier with female sweat connections?
Yes. For a drier that receives the tube directly, see the 3/8" sweat bi-flow heat pump drier, 16 cu in.
