Watts AquaLock - Large Diameter Union Pump Fitting
Watts AquaLock Large Diameter Union Pump Fitting
Universal push-to-connect pump fitting engineered for large-diameter applications with multi-material compatibility
Built for Reliable Pump Connections
Universal Compatibility
Connects directly to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing without adapters or special tools
Large Diameter Design
Engineered for high-flow pump applications where standard fittings create bottlenecks and pressure loss
Union Configuration
Allows quick pump removal for service without cutting lines or draining the entire system
Secure Seal Technology
AquaLock push-to-connect mechanism creates a permanent, leak-free connection on first insertion
Tubing and Thread Compatibility
| Polypropylene Tubing (OD) | Copper Tube Size (CTS) | Actual OD (inches) | NPT Thread Size |
|---|---|---|---|
| 3/8" OD | 1/4" CTS | 0.540" | 1/4" NPT |
| 1/2" OD | 3/8" CTS | 0.675" | 3/8" NPT |
| 5/8" OD | 1/2" CTS | 0.840" | 1/2" NPT |
| 7/8" OD | 3/4" CTS | 1.050" | 3/4" NPT |
| 1-1/8" OD | 1" CTS | 1.315" | 1" NPT |
| — | — | 1.660" | 1-1/4" NPT |
| — | — | 1.900" | 1-1/2" NPT |
| — | — | 2.375" | 2" NPT |
Works With Multiple Pipe Standards
The Watts AquaLock large diameter union fitting accepts CTS (Copper Tube Size), NPT (National Pipe Tapered thread), NPS (National Pipe Straight thread), and IPS (Iron Pipe Size) connections. Compatible with booster pumps, transfer pumps, and circulation pumps from major manufacturers including Watts, SeaTech, and other standard pump systems. Suitable for residential and light commercial water treatment applications.
Tool-Free Install
Push tubing into fitting until it seats—no wrenches, crimpers, or soldering required
Reusable Design
Union configuration allows pump removal and reinstallation without replacing fittings
Permanent Connection
AquaLock mechanism grips tighter under pressure for long-term reliability
Precision Engineering
Watts manufacturing standards ensure consistent fit across all compatible tubing types
Watts AquaLock Large Diameter Union Pump Fitting
Universal push-to-connect pump fitting engineered for large-diameter applications with multi-material compatibility
Built for Reliable Pump Connections
Universal Compatibility
Connects directly to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing without adapters or special tools
Large Diameter Design
Engineered for high-flow pump applications where standard fittings create bottlenecks and pressure loss
Union Configuration
Allows quick pump removal for service without cutting lines or draining the entire system
Secure Seal Technology
AquaLock push-to-connect mechanism creates a permanent, leak-free connection on first insertion
Tubing and Thread Compatibility
| Polypropylene Tubing (OD) | Copper Tube Size (CTS) | Actual OD (inches) | NPT Thread Size |
|---|---|---|---|
| 3/8" OD | 1/4" CTS | 0.540" | 1/4" NPT |
| 1/2" OD | 3/8" CTS | 0.675" | 3/8" NPT |
| 5/8" OD | 1/2" CTS | 0.840" | 1/2" NPT |
| 7/8" OD | 3/4" CTS | 1.050" | 3/4" NPT |
| 1-1/8" OD | 1" CTS | 1.315" | 1" NPT |
| — | — | 1.660" | 1-1/4" NPT |
| — | — | 1.900" | 1-1/2" NPT |
| — | — | 2.375" | 2" NPT |
Works With Multiple Pipe Standards
The Watts AquaLock large diameter union fitting accepts CTS (Copper Tube Size), NPT (National Pipe Tapered thread), NPS (National Pipe Straight thread), and IPS (Iron Pipe Size) connections. Compatible with booster pumps, transfer pumps, and circulation pumps from major manufacturers including Watts, SeaTech, and other standard pump systems. Suitable for residential and light commercial water treatment applications.
Tool-Free Install
Push tubing into fitting until it seats—no wrenches, crimpers, or soldering required
Reusable Design
Union configuration allows pump removal and reinstallation without replacing fittings
Permanent Connection
AquaLock mechanism grips tighter under pressure for long-term reliability
Precision Engineering
Watts manufacturing standards ensure consistent fit across all compatible tubing types
Original: $4.40
-65%$4.40
$1.54Description
Watts AquaLock Large Diameter Union Pump Fitting
Universal push-to-connect pump fitting engineered for large-diameter applications with multi-material compatibility
Built for Reliable Pump Connections
Universal Compatibility
Connects directly to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing without adapters or special tools
Large Diameter Design
Engineered for high-flow pump applications where standard fittings create bottlenecks and pressure loss
Union Configuration
Allows quick pump removal for service without cutting lines or draining the entire system
Secure Seal Technology
AquaLock push-to-connect mechanism creates a permanent, leak-free connection on first insertion
Tubing and Thread Compatibility
| Polypropylene Tubing (OD) | Copper Tube Size (CTS) | Actual OD (inches) | NPT Thread Size |
|---|---|---|---|
| 3/8" OD | 1/4" CTS | 0.540" | 1/4" NPT |
| 1/2" OD | 3/8" CTS | 0.675" | 3/8" NPT |
| 5/8" OD | 1/2" CTS | 0.840" | 1/2" NPT |
| 7/8" OD | 3/4" CTS | 1.050" | 3/4" NPT |
| 1-1/8" OD | 1" CTS | 1.315" | 1" NPT |
| — | — | 1.660" | 1-1/4" NPT |
| — | — | 1.900" | 1-1/2" NPT |
| — | — | 2.375" | 2" NPT |
Works With Multiple Pipe Standards
The Watts AquaLock large diameter union fitting accepts CTS (Copper Tube Size), NPT (National Pipe Tapered thread), NPS (National Pipe Straight thread), and IPS (Iron Pipe Size) connections. Compatible with booster pumps, transfer pumps, and circulation pumps from major manufacturers including Watts, SeaTech, and other standard pump systems. Suitable for residential and light commercial water treatment applications.
Tool-Free Install
Push tubing into fitting until it seats—no wrenches, crimpers, or soldering required
Reusable Design
Union configuration allows pump removal and reinstallation without replacing fittings
Permanent Connection
AquaLock mechanism grips tighter under pressure for long-term reliability
Precision Engineering
Watts manufacturing standards ensure consistent fit across all compatible tubing types
