RectorSeal 87030 Pro-Fit 1/4" to 3/8" Quick Connect Reducer, Push-to-Connect Refrigerant Fitting
The RectorSeal 87030 joins 1/4" tubing to 3/8" tubing in a straight line, with a push-to-connect port at each end and nothing to braze, flare, swage, or tighten. It is the transition an installer reaches for when a lineset diameter changes mid-run — a repair section that came off a different roll, a replacement unit specifying a larger liquid line than the original, or an extension where the available tubing does not match what is already in the wall. Brass body, patented double O-ring and grip-ring sealing, 870 psig design pressure and a 250°F continuous operating rating.
Is a 1/4" to 3/8" Reducer the Right Fitting Here?
Line sizing is set by the equipment manufacturer for the run length, lift, and capacity involved — a reducer is for executing a transition the design already calls for, not for making the tubing you happen to have on the truck work. Check the equipment's installation manual before changing diameter anywhere in a run.
Where the transition is legitimate, the 87030 makes it in one component. The two ends seat to different depths — 1" on the 1/4" side, 1-1/4" on the 3/8" side — so set the marking tool separately for each tube rather than using one figure for both. Neither end has a nut and neither is tightened; the grip rings clamp as the tube goes in, and a firm pull on each side confirms it. About an inch and a half of clean straight tube on each approach is all the room the fitting needs.
Ideal for: Repairs where the replacement section is a different diameter than the original, equipment changeouts calling for a larger liquid line, lineset extensions joining mismatched stock, and any straight-run transition where a torch is impractical.
Need the turn as well as the step? The RectorSeal 87033 reducing 90° elbow makes the same size change through a corner. For the next transition up, see the 87031 3/8" to 1/2" reducer.
Fitting selection is based on measured tube outside diameter and system operating conditions, and line sizing must follow the equipment manufacturer's requirements. Installation must be performed by an EPA 608-certified technician in accordance with RectorSeal's published instructions and applicable mechanical codes. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Fitting | 87030 — 1/4" to 3/8" Pro-Fit Quick Connect Reducer (one fitting) |
|---|---|
| Connection Type | Push-to-Connect, Straight Inline Reducer (1/4" x 3/8") |
| Body Material | Brass |
| Seal Design | Patented Double O-Ring and Grip Ring |
| Design Pressure | 870 psig (60 bar) |
| Continuous Operating Temperature | 250°F (121°C) |
| Insertion Depth | 1" on the 1/4" end, 1-1/4" on the 3/8" end |
| Assembly | Push-to-Connect — no tools, wrench, or torque required |
| Approved Tubing | Copper and Coated Aluminum Linesets |
| Certification | ICC-ES PMG-1616 (UL 207, UL 1963) |
One assembled reducer per unit, seal stack and grip-ring collars factory-installed, cased 10 per box. Both diameters fall inside the 87048 Pro-Fit Support Kit, whose marking tool carries both the 1" and 1-1/4" steps. Replacement tubing in either size is under ductless mini split copper line sets.
Reducer & Sealing Features
87030 Inline Transition Body
- Straight brass body stepping 1/4" to 3/8"
- Two independent push-to-connect ports
- Patented double O-ring seal at each end
- Grip ring sized to each tube diameter
- Machined internal transition between the bores
- 870 psig design pressure on both sides
- 250°F continuous operating temperature rating
- UV and corrosion resistant brass construction
- Sight window at each end for independent verification
- Certified under ICC-ES PMG-1616 to UL 207 and UL 1963
Straight-Run Size Changes
- Two different seat depths, 1" and 1-1/4", marked separately
- No nuts, wrench, or torque on either end
- No torch, brazing rod, flux, filler, or nitrogen purge
- Joins mismatched tubing stock on a repair or extension
- Handles a changeout that specifies a larger liquid line
- Shorter than a brazed reducer-and-nipple assembly
- Joins copper to copper or copper to coated aluminum
- Quick-release removal with the 87048 disconnect clip
- Approved for R-22, R-32, R-134a, R-290, R-410A, R-507, R-600a
- Packaged 10 per manufacturer case
Specifications & Manuals
Product documentation includes the full Pro-Fit part number table, insertion depth specifications, approved tubing and refrigerant lists, and the ICC-ES PMG product rating certificate covering the certified pressure and temperature ratings.
Frequently Asked Questions
Is the 87030 a straight reducer or an elbow?
A straight inline reducer. RectorSeal's catalog lists 87030–87032 as reducers and 87033–87035 as elbow reducers — the elbow reducers make the same size changes through a 90° turn.
What insertion depths do the two ends of the 87030 use?
1" on the 1/4" end and 1-1/4" on the 3/8" end. Set the marking tool separately for each tube — using one depth for both is the most common way a reducer ends up with a leg short of its sealing surfaces.
When would I need a 1/4" to 3/8" transition?
Typically on a repair where the replacement section is a different diameter than the original, or a changeout where the new equipment specifies a larger liquid line than the old one. Confirm against the equipment's installation manual before changing diameter mid-run.
Can the 87030 be used in either flow direction?
The fitting is not directional in terms of flow, but each end only accepts its own tube size — the 1/4" tube goes in the 1/4" port and the 3/8" tube in the 3/8" port. Which side faces the equipment is dictated by the line layout.
Does the reducer restrict the line?
A reducer is a transition, and any change in diameter has a flow consequence — but the fitting itself does not restrict below the smaller tube's own bore. It is machined full-size on each side with a transition between the two.
Which support kit covers the 87030?
The 87048 kit (1/4"–5/8"). Its four-step marking tool carries both depths this fitting needs, and it includes the disconnect clips for both sizes.
Click On Links Below For Documentation:
Technical Specifications
Brochure
Product Rating Certification
