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Gray PVC reducing male adapter, 1 in. MPT x 1-1/4 in. barbed insert, front view on white background showing threaded end and barb clearly.

1" x 1-1/4" PVC Reducing Male Adapter (MPT x Insert)

Brand: PVC
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$5.63
$4.22
SKU 1436132
In Stock (289)

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Durable PVC reducing male adapter designed for irrigation and general-purpose tubing connections. This 1 in. MPT x 1-1/4 in. insert (barb) fitting provides a secure transition from threaded outlets to flexible poly or vinyl tubing. Constructed to common ASTM standards, it is frequently used in potable water and landscape irrigation systems when NSF-listed parts are required.

  • Size: 1 in. male NPT (MPT) x 1-1/4 in. barbed insert — standard reducing configuration for hose and tubing connections.
  • Material: Schedule 40 PVC — chemical- and corrosion-resistant for long service life in outdoor systems.
  • Certifications: NSF-listed for potable water and manufactured to ASTM D-2609/D-1784 specifications where applicable.
  • Installation: Push the hose over the barbed insert and secure with a hose clamp; thread the MPT end into a female fitting or valve using appropriate thread sealant.
  • Compatibility: Works with polyethylene (PE), vinyl, rubber, and other flexible irrigation tubing; not intended for compressed air or gaseous service.
  • Performance: Suitable for typical irrigation temperatures (up to ~140°F) and common system pressures—follow local codes and manufacturer guidance for maximum ratings.

Compact and economical, this reducing male adapter offers a reliable, leak-resistant connection for repairs and system assemblies. Verify sizing before installation and use recommended clamps, sealant, and testing procedures for a secure, long-lasting connection.

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Frequently Asked Questions

What are the exact sizes and connection types?
This adapter is 1 in. male NPT (MPT) x 1-1/4 in. barbed insert, a reducing MPT-to-insert configuration for tubing connections.
Can I use this fitting for potable water?
Yes. This PVC adapter is commonly NSF-listed and made to ASTM specifications for potable water and irrigation use when labeled accordingly.
How should I install and secure the insert end?
Push tubing fully onto the barb and tighten a stainless-steel hose clamp. Apply thread sealant to MPT threads before tightening into a female fitting.