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ARMSTRONG Circulating Pump Coupler: Mfr Part # 816665-000, Cast Iron - Motor Couplers for Circulator Pumps
ARMSTRONGMotor Couplers for Circulator Pumps

ARMSTRONG Circulating Pump Coupler: Mfr Part # 816665-000, Cast Iron

The ARMSTRONG Circulating Pump Coupler, Mfr Part # 816665-000, is a cast-iron motor coupler for circulator pumps. It features 18 splines and is compatible with Armstrong S-69 series pumps and model 116516LF-137A.

SKU 3G-OTH-83526

Also listed as: 816665000 · 816665 000

Brand
ARMSTRONG
Item
Circulating Pump Coupler: Mfr Part # 816665-000, Cast Iron
Category
Motor Couplers for Circulator Pumps
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

ARMSTRONG
Manufacturer Part Number
816665-000
Coupling Material
Cast Iron
Compatible with Brand
Armstrong
Compatible with Series
S-69
Compatible with Manufacturer Model Number
116516LF-137A

Technical Documents

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ARMSTRONG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ARMSTRONG Circulating Pump Coupler, Mfr Part # 816665-000, is a cast-iron motor coupler for circulator pumps. It features 18 splines and is compatible with Armstrong S-69 series pumps and model 116516LF-137A.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the ARMSTRONG Circulating Pump Coupler used for?

This cast-iron coupler connects the motor to the pump shaft in Armstrong S-69 series circulator pumps, transmitting torque to move water in hydronic heating and cooling systems. It is a direct replacement for model 116516LF-137A.

What are the specifications of the ARMSTRONG 816665-000 coupler?

The ARMSTRONG 816665-000 coupler is made of cast iron with 18 splines. It is compatible with Armstrong S-69 series pumps and model 116516LF-137A. The manufacturer part number is 816665-000.

Where to buy the ARMSTRONG 816665-000 coupler worldwide?

3G Electric supplies the ARMSTRONG 816665-000 coupler worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this cast-iron pump coupler.

How to install the ARMSTRONG 816665-000 coupler?

To install, disconnect power, remove the old coupler, align the 18 splines with the motor and pump shafts, and slide the new cast-iron coupler into place. Ensure proper alignment to avoid vibration. Follow Armstrong pump service guidelines.

Used in

Common applications for ARMSTRONG
Hydronic heating systems — ARMSTRONG general-purpose inline circulator pump 182202-657 for potable water circulation
Pump motor replacement — ARMSTRONG pump motor 817025-007 for S&H 4-Series circulator pumps
Flange installation on E32.2HT pumps — ARMSTRONG flange hardware kit 810120-353K with steel bolts and rubber gaskets
Bearing replacement in H-32 series pumps — ARMSTRONG bearing assembly 816549MF-091 for in-line circulating pumps
Piping system connections — ARMSTRONG standard flanges 806074-621k for H-6 6 model with stainless steel and EPDM
Retrofit of pump flanges — ARMSTRONG flange 561100LF-001 for ASTRO EXPRESS 2 SYSTEM union-type connections

ARMSTRONG Products

3G Electric supplies ARMSTRONG motor couplers for circulator pumps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Cross-referenced by specification & description
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ARMSTRONG Bearing Assembly: for In-Line Circulating Pumps, Mfr Part # 818404-000K
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Bearing assembly for in-line circulating pumps, compatible with ARMSTRONG H Series. Supports pump rotor and maintains alignment. Includes four gaskets for sealing. Used in HVAC and fluid circulation systems
Single-phase, 115V AC, 3/8 hp OEM replacement motor for circulator pumps. Features a 48Z frame designation and is compatible with S&H 5-Series pumps. Used in hydronic heating and HVAC systems for water circulation
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Single-phase, 115V AC, 3/8 hp OEM replacement motor for circulator pumps. Features a 48Z frame designation and is compatible with S&H 5-Series pumps. Used in hydronic heating and HVAC systems for water circulation
Single-phase OEM replacement motor for S&H 5-Series circulator pumps. Rated 115V AC, 1/2 hp with 48Z frame designation. Suitable for HVAC and hydronic heating systems requiring reliable water circulation
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Single-phase OEM replacement motor for S&H 5-Series circulator pumps. Rated 115V AC, 1/2 hp with 48Z frame designation. Suitable for HVAC and hydronic heating systems requiring reliable water circulation

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Cast iron motor coupler designed to connect motor and pump shafts in circulator pumps. Transmits torque while accommodating minor misalignment. Compatible with Bell & Gossett PD-39 series pumps
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Cast iron motor coupler designed to connect motor and pump shafts in circulator pumps. Transmits torque while accommodating minor misalignment. Compatible with Bell & Gossett PD-39 series pumps