Burks 21965-4.97 Wet End Kit for G5-1-1/4 Series Pumps
When the motor on a Burks G5-1-1/4 is still running strong but the pump end has given up, replacing the wet end is almost always the smarter move. The 21965-4.97 is the complete hydraulic end for that pump family — cast iron casing, full-diameter 4.97" bronze impeller, mechanical seal, O-ring, slinger, and the hardware needed to put it all together. You reuse the 56J motor you already have and get a pump that performs like it did the day it was installed.
The G5-1-1/4 shows up in a lot of places that have nothing to do with boats: boiler feed and condensate return lines, cooling loops, parts washers, plating and process water systems, commercial laundries, and general liquid transfer around a plant. It handles clean, non-abrasive liquids up to roughly 225°F with the standard Buna-N seal, pushing in the neighborhood of 10 to 60 GPM at 3450 RPM through a 1-1/2" NPT suction and 1-1/4" NPT discharge.
One detail worth knowing before installation: the impeller ships at its full 4.97" diameter. Many production pumps left the factory with the impeller trimmed to match a specific horsepower or duty point, so measure the impeller coming out of your pump and trim the new one to match before you close the casing. Get that right and the kit drops straight onto your existing motor with no adapters and no realignment headaches.
Key Features
- Complete hydraulic pump end — casing, impeller, seal, and hardware in one kit
- Full-diameter 4.97" bronze impeller, trimmable to match your original duty point
- Rugged cast iron casing built for continuous commercial and industrial duty
- Carbon / ceramic / stainless / Buna-N mechanical seal for clean liquid service
- Buna-N casing O-ring and slinger washer included for a complete reseal
- Bolts directly to an existing 56J NEMA frame motor — no adapter required
- Genuine Burks (Crane Pumps & Systems) replacement, not an aftermarket copy
- Restores original hydraulic performance without buying a full pump and motor
Applications
- Boiler feed and condensate return systems
- Closed-loop heating and cooling water circulation
- Industrial process water and coolant transfer
- Parts washers and spray wash equipment
- Plating, finishing, and chemical rinse lines
- Commercial laundry and food processing water supply
- Car wash and pressure booster service
- General clean liquid transfer in plants and mechanical rooms
Specifications
- Part Number: 21965-4.97
- Product Type: Wet End Kit (pump end, no motor)
- Fits Pump Series: Burks G5-1-1/4
- Motor Frame Required: 56J NEMA
- Suction Port Size: 1-1/2" NPT
- Discharge Port Size: 1-1/4" NPT
- Impeller Diameter: 4.97" full size, trim to suit
- Impeller Material: Bronze
- Casing Material: Cast Iron
- Seal Type: Carbon / Ceramic / Stainless / Buna-N mechanical seal
- O-Ring Material: Buna-N
- Operating Speed: 3450 RPM
- Flow Range: Approximately 10–60 GPM
- Head Range: Approximately 20–55 feet
- Maximum Liquid Temperature: 225°F with standard Buna-N seal
- Liquid Service: Clean, non-abrasive liquids
- Brand: Burks / Crane Pumps & Systems
Frequently Asked Questions
Q: Does this kit include a motor?
A: No. The 21965-4.97 is the wet end only. It is designed to mount onto your existing 56J frame motor, which is why it costs far less than a complete pump and motor assembly.
Q: Why does the impeller need to be trimmed?
A: Burks ships the kit with a full 4.97" impeller so it can cover the whole G5-1-1/4 family. Individual pumps were built with impellers trimmed to match a specific horsepower or duty point, so match the new impeller to the diameter of the one you removed.
Q: What tells me the wet end is worn instead of the motor?
A: Loss of flow or pressure with a motor that still runs cool and quiet, water weeping from the seal area, or a grinding noise that stops when the coupling is disconnected all point to the pump end rather than the motor.
Q: Can this handle liquids other than water?
A: It works with clean, non-abrasive liquids that are compatible with bronze, cast iron, and Buna-N. Verify chemical compatibility before using it on solvents, acids, or petroleum products, since a different seal or elastomer may be required.
Q: Will the existing piping line up after installation?
A: Yes. The casing keeps the original 1-1/2" NPT suction and 1-1/4" NPT discharge in the same orientation, so existing pipe runs and unions connect back up without modification.
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