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Black push-fit elbow fitting, pack of ten, fiberglass-reinforced nylon body with pre-applied thread sealant

Legris

Legris 3129 56 18 Extended Male Elbow 3/8 NPT 1/4 Push-Fit PK10

SKU CH-6DZM-F18G7 MPN 3129

Pack of ten black push-fit elbow fittings with pre-applied thread sealant, connecting 1/4 inch tube to 3/8 inch NPT male thread for vacuum applications up to 290 psi and 175 degrees Fahrenheit

  • TypeDrain Components
  • MaterialHAWA
  • ColorBlack
  • Push-to-connect design speeds installation with 1/4 in tube
  • Pre-applied thread sealant on 3/8 NPT end prevents leaks
  • Fibreglass-reinforced nylon body resists corrosion and impact
  • Rated for 290 psi and 175 °F vacuum service
  • Pack of ten fittings covers multiple connection points

Extended Male Elbow Fitting

The Legris 3129 56 18 is a push-fit elbow fitting designed for vacuum applications. It connects a 1/4 in outer diameter tube on one end to a 3/8 in male NPT thread on the other. The body is made from black fiberglass-reinforced nylon and includes pre-applied thread sealant. It is sold in a pack of ten pieces.

Suitable For Vacuum Lines

This fitting suits installers who need a compact 90-degree connection between 1/4 in tubing and a 3/8 NPT port in vacuum systems. It is not intended for pressurised lines exceeding 290 psi or for service temperatures above 175 degrees F. Buyers who need a straight connector or a different thread size should look at other fittings.

290 psi Maximum Operating Pressure

The fitting is rated for a maximum operating pressure of 290 psi. This single figure determines whether the part can handle the system pressure in your application. If your circuit runs higher, this elbow is not the correct component.

Highlights

  • Push-to-connect design speeds installation with 1/4 in tube
  • Pre-applied thread sealant on 3/8 NPT end prevents leaks
  • Fibreglass-reinforced nylon body resists corrosion and impact
  • Rated for 290 psi and 175 °F vacuum service
  • Pack of ten fittings covers multiple connection points

Specifications

TypeDrain Components
MaterialHAWA
ColorBlack
BrandLegris
Model3129 56 18

Questions about this item

How do I install the 3/8 NPT male thread on the Legris 3129 56 18 elbow without damaging the pre-applied sealant?

Hand-tighten the 3/8 NPT male thread into the female port, then use a wrench for one to two additional turns. The pre-applied sealant on the taper threads provides the seal, so avoid over-tightening which can strip the threads or crack the fiberglass-reinforced nylon body.

Will the push-to-connect collet on the 1/4 inch tube side need replacement after repeated disconnections?

The stainless-steel collet teeth and internal EPDM O-ring are designed for multiple connect-disconnect cycles. Replace the fitting if the collet no longer grips the tube firmly or if the O-ring shows cuts, flattening, or chemical swelling from the fluid used.

At what point does the 290 psi pressure rating become the limiting factor during sustained high-temperature operation?

The 290 psi maximum operating pressure applies up to the 175 °F temperature limit. As temperature approaches 175 °F the fiberglass-reinforced nylon body softens, so the pressure rating drops; sustained use at the upper temperature range requires derating the pressure below 290 psi.

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