Direct cross-reference replacement Taco 571-2 & Honeywell V8043E zone valve powerheads, Bell & Gossett Series 100 couplers, Weil-McLain ignitors, Watts 1156F regulators, McDonnell & Miller LWCO probes, and Fasco draft inducers.
Stamped / OEM: 555-050RP / 571-2 / 570-2 / 572-2
Specs: 24VAC, 0.9 Amp wax-element thermal actuator; Terminals 1 (Thermostat), 2 (End Switch/Transforme
In Stock · Ships 1–2 Days
Stamped / OEM: 40003916-026 / V8043E1012 / 802360 / 40003916-021
Specs: 24VAC, 50/60Hz; 18" 4-wire leads (2 yellow motor + 2 red isolated end-switch); includes 802360
In Stock · Ships 1–2 Days
Stamped / OEM: 7021-9450 / 7021-10702 / 320725-756 / HC21ZE117
Specs: 115V AC, 60Hz, 1.8 Amp, 3000 RPM shaded-pole ball-bearing motor; 1/30 HP; CCW rotation; include
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Stamped / OEM: 383-500-095 / 511-330-403 / 511-330-148 / AG13A020
Specs: 120V silicon nitride ignitor element + stainless flame sense rod + high-temp ceramic burner fla
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Stamped / OEM: 118844 / 189134LF / 118705 / P2Z-12291
Specs: 1/2" x 1/2" bore cast-iron spring coupling with eyelet springs; direct match for 189134LF beari
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Stamped / OEM: 7000BMVR / 720-400 / 7200ER / 700-506
Specs: 1/2" x 3/4" NPT inlet/outlet (includes reducer bushings); 3.5" WC Natural Gas regulator (LP con
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Stamped / OEM: 0067397 / 1156F / SB1156F / S1156F
Specs: 1/2" sweat/NPT union inlet x 1/2" NPT female outlet; factory preset 15 PSI (adjustable 10–25 PS
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Stamped / OEM: 070 / 071 / TEK-070 / TEK-071
Specs: 10,000 Ohm @ 77°F (25°C) Type-2 NTC thermistor; UV-resistant gray polycarbonate outdoor sun-shi
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Stamped / OEM: Q314A4586 / Q340A1090 / Q314A-4586 / Q340A-1090
Specs: B-type bracket; 1/4" compression inlet; BCR-18 Natural Gas & BBR-11 LP orifices included + 36"
In Stock · Ships 1–2 Days
Stamped / OEM: RB-122-E / 171207 / 67 / PS-802-24
Specs: 24VAC, 20,000 Ohm sensitivity; 3/4" NPT brass self-cleaning probe; automatic reset with 15-seco
In Stock · Ships 1–2 Days| SKU | Part Description | Stamped / OEM Part Numbers | Critical Dimensions & Spec | Price | Action |
|---|---|---|---|---|---|
SF-HVC-101 | Taco 555-050RP / 571-2 24V Hydronic Boiler Zone Valve Replacement Power Head Actuator (3-Terminal Heat Motor) | 555-050RP 571-2 570-2 572-2 573-2 555-050 | 24VAC, 0.9 Amp wax-element thermal actuator; Terminals 1 (Thermostat), 2 (End Switch/Transformer), 3 (Boiler TT); twist-lock mount | $84.99 | |
SF-HVC-102 | Honeywell Resideo 40003916-026 / V8043E1012 24V 4-Wire Hydronic Zone Valve Replacement Powerhead (With End Switch) | 40003916-026 V8043E1012 802360 40003916-021 V8043F1036 | 24VAC, 50/60Hz; 18" 4-wire leads (2 yellow motor + 2 red isolated end-switch); includes 802360 motor & manual opener lever | $99.99 | |
SF-HVC-103 | Fasco A157 / 7021-9450 & 7021-10702 Furnace Draft Inducer Venter Blower Motor Assembly (Carrier / Bryant 320725-756) | 7021-9450 7021-10702 320725-756 HC21ZE117 A157 J238-150-1571 | 115V AC, 60Hz, 1.8 Amp, 3000 RPM shaded-pole ball-bearing motor; 1/30 HP; CCW rotation; includes blower wheel & cooling fan | $124.99 | |
SF-HVC-104 | Weil-McLain 383-500-095 / 511-330-403 Silicon Nitride Hot Surface Ignitor, Flame Sensor & Gasket Kit (GV / WM97 / Ultra) | 383-500-095 511-330-403 511-330-148 AG13A020 382-200-448 | 120V silicon nitride ignitor element + stainless flame sense rod + high-temp ceramic burner flange gasket & screws | $89.99 | |
SF-HVC-105 | Bell & Gossett 118844 (P2Z-12291) Cast-Iron Spring Coupler & 189134LF Bearing Assembly Spec for Series 100 Circulator | 118844 189134LF 118705 P2Z-12291 189034 BG-118844 | 1/2" x 1/2" bore cast-iron spring coupling with eyelet springs; direct match for 189134LF bearing assembly & 118705 flange gaskets | $46.99 | |
SF-HVC-106 | Robertshaw 7000BMVR / 720-400 (7200ER) 24V & 750mV Millivolt Combination Gas Valve (1/2" & 3/4" NPT) | 7000BMVR 720-400 7200ER 700-506 710-502 RS-7000BMVR | 1/2" x 3/4" NPT inlet/outlet (includes reducer bushings); 3.5" WC Natural Gas regulator (LP conversion kit compatible); 250–750mV | $118.99 | |
SF-HVC-107 | Watts 0067397 / SB1156F (1156F) 1/2" High-Capacity Hydronic Boiler Feed Water Pressure Regulator Valve | 0067397 1156F SB1156F S1156F 7014650 WATTS-1156F | 1/2" sweat/NPT union inlet x 1/2" NPT female outlet; factory preset 15 PSI (adjustable 10–25 PSI); high-capacity fast-fill purging lever | $98.99 | |
SF-HVC-108 | Tekmar 070 / 071 Outdoor & Universal 10k Ohm NTC Thermistor Temperature Sensor for Boiler Reset Controls | 070 071 TEK-070 TEK-071 TH-DS-PAIR 10K-NTC-TYPE2 | 10,000 Ohm @ 77°F (25°C) Type-2 NTC thermistor; UV-resistant gray polycarbonate outdoor sun-shield enclosure; 1/2" conduit knockout | $64.99 | |
SF-HVC-109 | Honeywell Q314A4586 Standing Pilot Burner Assembly & Q340A1090 36" Universal 30mV Copper Thermocouple Kit | Q314A4586 Q340A1090 Q314A-4586 Q340A-1090 JA-DD-ISO BCR-18 | B-type bracket; 1/4" compression inlet; BCR-18 Natural Gas & BBR-11 LP orifices included + 36" 30mV universal thermocouple | $54.99 | |
SF-HVC-110 | McDonnell & Miller RB-122-E (171207) / Series 67 & 750B-24 24VAC Electronic Low Water Cut-Off (LWCO) & Probe Kit | RB-122-E 171207 67 PS-802-24 36C03-300 MM-RB122E | 24VAC, 20,000 Ohm sensitivity; 3/4" NPT brass self-cleaning probe; automatic reset with 15-second anti-slosh delay; green/red LEDs | $112.99 |