Webster SPM-15-1 SPM Series Supply Pump – 115V, 1/6 HP Motor
Product Overview
The Webster SPM-15-1 Supply Pump is a high-performance two-stage fuel oil pump/motor unit, combining the Suntec 2R181C-5BQ4 pump, a direct-coupled Leeson 1/6 HP motor, and a premium ASHCROFT 63mm gauge (638008A4G02LP0LV). Designed for reliable fuel delivery from central storage tanks to remote heating units or auxiliary tanks, this unit ensures consistent flow, accurate pressure monitoring, and long-lasting performance.
⚠️ Note: Marathon small-frame motors below 182T are now manufactured under the Leeson brand, maintaining the same quality, standards, and technical support.
Additional Info: The ASHCROFT 63mm gauge is included and monitors 30" vacuum to 100 PSI, ensuring precise system operation.
Key Features ✅
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✅ Direct-coupled pump/motor unit for reliable operation
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✅ Suntec 2R181C-5BQ4 two-stage fuel pump
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✅ Flow Rate: 15 GPH @ 80 PSI
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✅ Maximum Pressure: 180 PSI, factory set at 20 PSI
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✅ Counterclockwise (CCW) rotation from shaft end
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✅ Integral check valve maintains fuel in feeder lines for instant starts
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✅ Self-cleaning rotary filter prevents debris buildup
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✅ Double lip seals for reduced friction and leak protection
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✅ Mounting: Four-bolt foot mount with flange
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✅ Leeson 1/6 HP motor: 115V, 60Hz, 1-phase, continuous duty
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✅ ASHCROFT 63mm gauge included for accurate pressure monitoring
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✅ 1/4" NPTF inlet/outlet and top/bottom returns for versatile installation
Specifications
Motor Specifications – Leeson 048S17T290
| Specification | Value |
|---|
| Brand |
Leeson (formerly Marathon) |
| Part Number |
048S17T290 |
| Catalog Number |
O601 |
| Model Number |
48S17T290V |
| Horsepower |
1/6 HP |
| Voltage |
115V |
| Frequency |
60 Hz |
| Phase |
1-phase |
| RPM |
1725 RPM |
| Motor Frame |
48NZ |
| Enclosure |
NEMA 1 |
| Speed |
1-speed |
| IP Rating |
IP43 |
| Duty Cycle |
Continuous |
| Ambient Temperature |
40°C (104°F) |
| Watts @ 85 PSI |
65 W |
| Notes |
Direct-coupled to pump; replacement for small-frame Marathon motors below 182T |
Pump Specifications – Suntec 2R181C-5BQ4
| Specification | Value |
|---|
| Model |
Suntec 2R181C-5BQ4 |
| Series |
R Series |
| Type |
Two-stage |
| Flow Rate |
15 GPH @ 80 PSI |
| Maximum Pressure |
180 PSI |
| Factory Set Pressure |
20 PSI |
| Inlet Ports |
1/4" NPTF (top & bottom returns) |
| Outlet Port |
1/4" NPTF |
| Nozzle Port |
1/8" NPTF (side location) |
| Maximum Inlet Vacuum |
15" Hg |
| Shaft |
7/16" dia. x 3.69" extension, stepped to 5/16" at coupling end |
| Mounting |
Flange mount / Four-bolt foot mount |
| Filter |
Self-cleaning rotary filter |
| Seal Type |
Double lip seals |
| Rotation / Nozzle Port |
Counterclockwise (CCW) from shaft end / Left side |
| Pressure Regulator |
Maintains set pressure |
| Check Valve |
Maintains oil in feeder lines for instant starts |
Gauge Specifications – ASHCROFT 638008A4G02LP0LV
| Specification | Value |
|---|
| Brand |
ASHCROFT |
| Part Number |
638008A4G02LP0LV |
| Size |
63 mm |
| Wetted Material |
Bronze / Brass |
| Case Material |
304 Stainless Steel |
| Filled With |
Glycerin |
| Connection |
1/4" NPT, lower mount |
| Gauge Window Material |
Polycarbonate |
| Case Mount |
None |
| Accuracy |
±1.6% |
| Pressure / Vacuum Range |
30" vacuum to 100 PSI |
Common Symptoms of Pump/Motor Issues ⚠️
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💧 Weak or intermittent fuel delivery
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⚡ Difficulty starting remote heating units
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🔧 Fuel leakage around pump seals
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📉 Inconsistent pressure readings
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🌀 Excessive vibration or noise during operation
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🌬️ Pump not building full vacuum (max 15" Hg)
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💦 Flow rate lower than 15 GPH
Frequently Asked Questions (FAQ) ❓
Pump Questions
Q: Can the SPM-15-1 pump be used with any motor? ⚡
A: No — it comes with a direct-coupled Leeson motor optimized for the SPM series pump operation.
Q: What is the maximum pressure of the pump? 📈
A: The Suntec 2R181C-5BQ4 pump in the Webster SPM-15-1 unit can handle a maximum pressure of 180 PSI, with the factory set operating pressure at 20 PSI.
Q: What is the flow rate of the pump? 💧
A: The Suntec 2R181C-5BQ4 pump delivers a flow rate of 15 GPH at 80 PSI.
Q: What type of filter does the pump use? 🛡️
A: The pump features a self-cleaning rotary filter.
Q: What are the inlet and outlet port sizes? 🔩
A: 1/4" NPTF inlet/outlet ports with top and bottom returns.
Q: What type of seal does the pump use? 🔧
A: Double lip seals for leak protection.
Q: What is the rotation direction of the pump? 🔄
A: Counterclockwise (CCW) from the shaft end.
Q: What mounting options are available? 🏗️
A: Flange mount with four-bolt foot mount.
Q: What is the maximum vacuum the pump can achieve? 🌬️
A: 15" Hg maximum.
Q: Can the pump be used in high-temperature environments? 🌡️
A: Yes, up to 40°C (104°F).
Q: How do I maintain or clean the pump? 🧰
A: Inspect the self-cleaning rotary filter and keep inlet/outlet ports free of debris.
Q: Is this pump suitable for multiple heating units? 🏠
A: Yes, it can supply fuel to multiple remote heating units.
Motor Questions ⚡
Q: What is the horsepower of the motor? 💪
A: 1/6 HP.
Q: What voltage and frequency does the motor use? ⚡
A: 115V, 60 Hz, single-phase.
Q: Can I replace the Leeson motor with another brand? 🔄
A: No — the SPM-15-1 is designed for direct-coupled Leeson motors.
Q: What is the motor’s duty cycle? 🔁
A: Continuous.
Q: What type of enclosure does the motor have? 🛡️
A: NEMA 1, IP43 rating.
Q: What is the RPM and speed of the motor? ⚙️
A: 1725 RPM, single-speed design.
Q: Does the motor require special maintenance? 🧰
A: No, maintenance-free under normal conditions.
Q: Can the motor handle continuous operation? 🔄
A: Yes.
Gauge Questions 📊
Q: What gauge is included?
A: ASHCROFT 63mm gauge, model 638008A4G02LP0LV.
Q: What is the pressure/vacuum range?
A: 30" vacuum to 100 PSI.
Q: What materials are used for the gauge?
A: Wetted: Bronze/Brass; Case: 304 SS; Window: Polycarbonate; Filled: Glycerin.
Q: How is the gauge connected?
A: 1/4" NPT, lower mount.
Q: How accurate is the gauge?
A: ±1.6%.
Shopping Tips 🛒
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Confirm flow and pressure requirements: 15 GPH @ 80 PSI, max 180 PSI.
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Verify motor voltage and phase: 115V, 1-phase, 60Hz.
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Ensure porting and mounting style: 1/4" NPTF, four-bolt foot mount.
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Check ambient operating temperature: Max 40°C / 104°F.
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Gauge included – no need to purchase separately.
