Why is there moisture in the exhaust air of my Graco Water Pump?
- CChristina WilcoxSep 13, 2025
Moisture in the exhaust air of your Graco Water Pump is likely due to high inlet air humidity. To resolve this, use a drier air supply.

Why is there moisture in the exhaust air of my Graco Water Pump?
Moisture in the exhaust air of your Graco Water Pump is likely due to high inlet air humidity. To resolve this, use a drier air supply.
| Type | Air-Operated Double Diaphragm Pump |
|---|---|
| Maximum Fluid Pressure | 125 psi (8.6 bar) |
| Maximum Solid Size | 1/8 in (3.2 mm) |
| Maximum Flow Rate | 50 gpm (189 l/min) |
| Fluid Inlet Size | 1 in npt(f) |
| Fluid Outlet Size | 1 in npt(f) |
| Maximum Suction Lift | 20 ft (6.1 m) |
| Wetted Materials | Aluminum, Polypropylene, Stainless Steel |
| Diaphragm Materials | Buna-N |
| Max Flow Rate | 105 GPM (397.5 LPM) |
| Power Source | Pneumatic |
Identifies risks from flammable fumes and ignition sources in the work area.
Covers safe operating practices, fatigue, and general equipment handling precautions.
Details hazards from pressurized systems, materials, fluids, and required personal protective equipment.
Steps to safely relieve system pressure before performing maintenance or repairs.
Instructions for repairing, rebuilding, or replacing air valve and diaphragm assemblies.
Procedures for servicing check valves, manifolds, and associated o-rings.
Guidance on proper torque values and patterns for reassembling pump components.
Quick reference table for pump part numbers, kits, and descriptions.
Details on center sections, air valves, fluid covers, and manifolds.
Information on seats, check balls, diaphragms, and manifold o-rings.
Lists available accessories, specialized kits, and related items for the pump.
Key operating parameters including pressure, flow rates, speed, and displacement.
Details fluid temperature range, pumpable solids, and inlet/outlet sizes.
Provides sound power/pressure levels and pump weight by material.
Lists wetted part materials and their compatibility with pump construction.
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