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31901A - 3/4" Mnpt Fitting - Caleffi

Brand: Caleffi
Part #: 31901A
$11.78

List Price: $18.40
🚚 Factory Ordered This item is ordered straight from the factory just for you! We'll ship it as soon as it reaches our distribution center.
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Brand New Part
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Description / 31901A - 3/4" Mnpt Fitting - Caleffi

3/4" Mnpt Fitting
Caleffi • Hydraulics & Valves
31901AFitting

Caleffi 31901A 3/4" mnpt fitting hydronic valve replacement part

Genuine Caleffi fitting — PEX, compression, press, or inverted flare connection fitting for use with Caleffi manifolds, valves, and accessories.

🔌 Connection Type

NPT (National Pipe Tapered) — standard American tapered thread, requires thread sealant (PTFE tape or pipe dope)

🔍 What This Part Fixes

✖ Problem Symptoms

  • ✖ Additional or replacement fittings required for manifold or valve connections

✓ What This Restores

  • ✓ Correct Caleffi-specified connection type for PEX, copper press, or compression connections
  • ✓ Low-lead certified for potable water applications where required

🔧 Installation Overview

  1. Use the correct fitting type for your tubing material (PEX, copper, stainless)
  2. Follow manufacturer torque specifications for compression fittings
  3. For press fittings: use the correct press jaw for the fitting size and material

📋 Specifications

DetailValue
Part Number31901A
BrandCaleffi
TypeFitting
ApplicationManifold & Valve Connections
Pipe Size3/4"
Connection TypeMNPT (Male NPT)

❓ Common Questions

Q: What connection types does Caleffi use for radiant manifolds?

A: Caleffi TwistFlowâ„¢ and other radiant manifolds use port fittings compatible with PEX (expansion or crimp), PEX-AL-PEX, and compression connections depending on the fitting ordered. Verify the fitting type and size match your tubing before ordering.

Need help selecting the right Caleffi part?

Our team can verify compatibility with your system before you order.

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