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Caleffi NA669250 : Flow meter 1/2 to 2 gpm

Caleffi

MSRP: $42.00
Your Price:  $29.40
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SKU:
NA669250
Condition:
New
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The Caleffi NA669250 is a replacement sight flow meter (1/2 - 2 gpm) for Caleffi TwistFlow radiant distribution manifolds, restoring per-loop flow indication and balancing on the supply manifold.

Product data compiled from Caleffi North America technical documentation (01170 NA, 01155 NA). Last reviewed July 2026.

FunctionService Part
Warranty2 Years

Key Features

Sight Flow Meter, 1/2 - 2 gpm

Replacement PSU sight-gauge flow meter reading 1/2 - 2 gpm for direct visual loop balancing.

Per-Loop Balancing Restored

Renews flow indication on a TwistFlow supply-manifold outlet after wear or damage.

Tool-Simple Swap

Replaces the existing meter body on the manifold outlet without removing the manifold.

Technical Data

FunctionManifold / mixing station service part
Flow meter scale1/2 - 2 gpm
BodyPSU sight gauge
Maximum operating pressure87 psi (6 bar)
Medium temperature range41 - 176 F (5 - 80 C)

Documentation

Related Products

Caleffi NA11360Manifold PartCaleffi NA160601 in Manifold PartCaleffi NA160691 in Manifold PartCaleffi 1725C1A3-Port 1-1/4 in Mixing Station

Frequently Asked Questions

Which manifolds does the NA669250 fit?

Caleffi TwistFlow radiant distribution manifolds - it replaces the sight flow meter on a supply-manifold outlet.

What range does it read?

1/2 - 2 gpm, on a visible PSU sight gauge used for loop balancing.

Do I have to remove the manifold to replace it?

No. The meter body replaces on the outlet with the manifold in place.

2-Year Limited Warranty. Backed by Caleffi North America's limited warranty against defects in material and workmanship for two years from date of shipment. See Caleffi's limited warranty for full terms.
Type:
Accessory
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