RectorSeal 87033 Pro-Fit 1/4" to 3/8" Quick Connect Reducing 90° Elbow, Push-to-Connect Refrigerant Fitting
The RectorSeal 87033 does two jobs in one brass body: it turns the line 90 degrees and steps it from 1/4" to 3/8" at the same time. Done conventionally, that corner takes a reducing coupling, a separate ell, and a short nipple between them — three brazed joints where there could be one fitting and two push connections. The 87033 collapses all of it into a single component with a patented double O-ring and grip-ring seal at each port, rated to 870 psig with a 250°F continuous operating temperature and installed without a torch, a bender, or a wrench.
Is a 1/4" to 3/8" Reducing Elbow the Right Fitting Here?
This fitting earns its place where a size change and a direction change land in the same few inches of line — a 1/4" liquid line arriving at an equipment stub that faces sideways and runs 3/8", a retrofit where the replacement unit's port diameter and orientation both differ from the old one, or a corner in a chase too tight to fit a reducer and an elbow end to end. If the transition and the turn are far enough apart to handle separately, a straight 87030 reducer plus a plain elbow will usually be easier to route.
The two legs seat to different depths, which is the detail most often missed on a reducing fitting. The 1/4" side takes 1" of tube and the 3/8" side takes 1-1/4". Mark each tube to its own figure — using one depth for both is how a leg ends up short of the sealing surfaces. Neither leg is tightened; the grip rings set on insertion, so confirm both through the sight windows and pull firmly on each before pressurizing.
Ideal for: Corners where a 1/4" liquid line meets a 3/8" equipment connection, retrofit installs with mismatched port size and orientation, tight chases with no room for two separate fittings, and repairs that have to reduce and turn in the same short run.
Need the next transition up? Move to the RectorSeal 87034 Pro-Fit 3/8" to 1/2" Reducing 90° Elbow, or use the 87024 1/4" elbow when the line turns without changing size.
Fitting selection is based on measured tube outside diameter and system operating conditions. 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 | 87033 — 1/4" to 3/8" Pro-Fit Quick Connect Reducing 90° Elbow (one fitting) |
|---|---|
| Connection Type | Push-to-Connect, Fixed 90° Elbow 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" leg, 1-1/4" on the 3/8" leg |
| 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 reducing elbow per unit, with the seal stack and grip-ring collars installed at the factory; RectorSeal cases the elbow reducers 10 per box. Both sizes fall inside the 87048 Pro-Fit Support Kit (1/4"–5/8"), whose depth gauge carries the marks for both legs. Tubing in either diameter is listed under ductless mini split copper line sets.
Reducing Elbow & Sealing Features
87033 Dual-Function Body
- Combines a 90° turn and a 1/4"-to-3/8" size change in one brass body
- Replaces a reducer, a nipple, and an elbow with a single fitting
- Patented double O-ring seal at each of the two ports
- Independent grip ring sized to each leg's diameter
- 870 psig design pressure across both sides
- 250°F continuous operating temperature rating
- Machined internal transition between the two bores
- UV and corrosion resistant brass construction
- Sight window on each leg for independent verification
- Certified under ICC-ES PMG-1616 to UL 207 and UL 1963
Installation in Confined Corners
- Two different insertion depths — 1" and 1-1/4" — marked separately
- No nuts, wrench, or torque step on either leg
- Eliminates two of the three joints a brazed version would need
- No torch, flux, filler rod, or nitrogen purge
- Fits where a reducer and elbow will not sit end to end
- Handles mismatched retrofit port size and orientation
- 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
What does a reducing elbow do that a plain elbow cannot?
It changes line size and direction in the same fitting. A plain elbow keeps the diameter constant through the turn; the 87033 takes 1/4" tube in one leg and 3/8" out the other, which saves fitting a separate reducer alongside it.
Which end of the 87033 is the 1/4" side?
The two legs are physically different diameters, so the fitting identifies itself — the smaller collar and shallower bore is the 1/4" side. Confirm by measuring before cutting, since both tube ends are cut to different depths.
Do the two legs of the 87033 use different insertion depths?
Yes, and this is the detail most often missed. The 1/4" leg takes 1" and the 3/8" leg takes 1-1/4". Mark each tube to its own figure rather than using one measurement for both.
Is the 87033 the same as the 87030 straight reducer?
No. Both step 1/4" to 3/8", but the 87030 is a straight in-line reducer and the 87033 makes the same size change through a fixed 90° turn. RectorSeal's catalog lists 87030–87032 as reducers and 87033–87035 as elbow reducers.
Can I use the 87033 to connect a 1/4" line to a 3/8" equipment stub?
It joins 1/4" tube to 3/8" tube through a 90° turn. Both ends are push-to-connect and accept bare tubing — neither end threads onto equipment. For landing a lineset on a threaded flare port, the Pro-Fit sockets are the fitting designed for that.
Does stepping up the line size affect system performance?
Line sizing is set by the equipment manufacturer's requirements for the run length, lift, and capacity involved. Use a transition only where the design calls for one — check the equipment's installation manual rather than changing diameter to suit the available tubing.
Click On Links Below For Documentation:
Technical Specifications
Brochure
Product Rating Certification
