Best Water Hammer Arrestors for Washing Machines
Water hammer and pressure surges can cause annoying banging and stress plumbing when a washing machine cycles. A dedicated water hammer arrestor absorbs that shock, protecting pipes, fittings, and valves. This guide highlights five top 3/4 inch arrestors, chosen for durability, simple installation, and broad compatibility with common laundry setups. Use the quick table below to compare essentials at a glance, then read detailed notes for each product to help you choose the best option for your home.
Here is a quick comparison of chosen products:
| Product | Brand | Fitting | Highlights |
|---|---|---|---|
| Sioux Chief 660-HB Water Hammer Hose Arrestor | Sioux Chief | 3/4″ nominal; 1/2″ copper leg | Versatile: compression, sweat, PEX |
| EFIELD S-241 Stainless Steel Arrestor | EFIELD | 3/4″ FHT x 3/4″ MHT | Stainless steel; horizontal/vertical |
| SUNGATOR Water Hammer Arrestor | SUNGATOR | 3/4″ MHT x 3/4″ FHT | Includes sealing tape; 250 PSI/180°F |
| Lidertik Washing Machine Arrestor | Lidertik | 3/4″ male/female threads | 2-pack; easy install; reduces shock |
| Procellatech Stainless Steel Arrestor | Procellatech | 3/4″ MHT x 3/4″ FHT | Brass body; lead-free |
Sioux Chief 660-HB Water Hammer Hose Arrestor
The Sioux Chief 660-HB is a 3/4-inch water hammer arrestor designed for versatile, straight installations. It supports straight compression arresters for any 1/2″ nominal copper leg or riser, which makes it a popular retrofit option where 1/2″ nominal air chambers are used. It also accommodates straight sweat arresters compatible with press-fitting systems, including Viega ProPress, and other push-fitting connections.
With broad compatibility, this unit can adapt to PEX systems via available connections (F1807, F1960, and Viega PEXpress options). In a typical laundry setup, it dampens valve closures and sudden water movement, helping to prevent noisy pipes and stress on fittings. The compact design fits tight laundry boxes while delivering reliable, durable performance over time.
EFIELD S-241 Stainless Steel Water Hammer Arrestor
This two-piece stainless steel arrestor is designed for washing machine supply valves or direct tube connections. It features a 3/4 inch female swivel hose thread to 3/4 inch male hose thread, with a max working pressure rating of 250 PSI. Installation can be horizontal or vertical, offering flexibility in constrained laundry spaces.
Constructed in stainless steel, the S-241 emphasizes durability and corrosion resistance for long-term use. The two-pack configuration provides practical value for multi-point installations around a laundry area, while maintaining consistent performance across fittings and orientations.
SUNGATOR Washing Machine Water Hammer Arrestor
The SUNGATOR arrestor is a straight 3/4″ GHT connection with 3/4″ MHT to 3/4″ FHT. It includes sealing tape and is rated up to 250 PSI and 180°F, making it suitable for typical domestic washer hookups and related fixtures. The design helps prevent pipe banging by damping hydraulic shocks and stabilizing pressure fluctuations in the line.
Suitable for a range of uses beyond the washing machine, this arrestor can be deployed with garden hoses, outdoor spigots, and other laundry fixtures. Its stainless steel construction offers durability in damp laundry environments, and the included sealing tape simplifies proper sealing at connection points.
Lidertik Washing Machine Water Hammer Arrestor
This 2-pack arrestor from Lidertik is designed for simple installation on washing machines and outlets. It features 3/4 inch male threads paired with 3/4 inch female threads, enabling straightforward attachment to standard washer supply lines. The units absorb shock and reduce noise, helping protect both washers and water supply lines from repetitive hammering.
Two pieces come in the box, offering practical value for installations that require multiple arrestors in a laundry area or nearby fixtures. The compact design supports installation in tight spaces without compromising performance, making it a convenient option for residential laundries.
Procellatech Stainless Steel Water Hammer Arrestor
The Procellatech stainless steel arrestor is designed for washing machine connections with 3/4″ MHT x 3/4″ FHT ends. It emphasizes a durable stainless steel build, suitable for use with typical 80% of household piping configurations. The arrestor uses a piston-based mechanism to dissipate shock waves and protect pipes from water hammer, thereby reducing banging and extending insulation life of connected fixtures.
In the feature notes, the unit highlights a straightforward installation path for washers, toilets, basins, and dishwashers, with a focus on reliable performance in residential plumbing. The design aims to balance ease of installation with durable, long-term operation in a compact footprint.
Buying Guide
When selecting a water hammer arrestor for a washing machine, consider how you’ll connect to existing piping, the space you have, and the expected load on the line. The most common connections are 3/4″ male and female threads (MHT/FHT) and garden-hose-style (GHT) fittings. Materials vary from stainless steel to brass combinations, with stainless offering extra corrosion resistance in damp laundry areas. Always verify the maximum working pressure and temperature rating to ensure compatibility with your plumbing setup.
Key considerations to guide your choice include installation orientation, durability, and compatibility with different pipe materials. Some arrestors are made for horizontal or vertical mounting, while others support flexible orientations. For households with hard water or frequent valve cycling, higher-quality materials and seals can reduce maintenance and prolong service life. Certification and safety features, such as lead-free construction or UPC/NSF compliance, can also influence long-term reliability and health considerations.
Size, Fittings, And Compatibility
- Fitting types: 3/4″ MHT/FHT is the most common for washing machines; check whether your supply line uses compression, sweat, or press-fit connections (e.g., Viega ProPress).
- Thread compatibility: Ensure the arrestor’s threads match your hoses and outlets. Some models pair MHT with FHT, while others use GHT for garden hoses.
- Pipe material compatibility: Copper, PEX, brass, or stainless steel lines may require different arrestor styles or adapters.
Materials And Durability
- Stainless steel: Superior corrosion resistance, longer service life in damp environments.
- Brass/brass-plated: Durable with good seal compatibility; often used in budget-friendly options.
- Lead-free construction: Consider lead-free materials for drinking-water safety and compliance.
Installation And Maintenance
- Orientation: Some arrestors support horizontal or vertical installation, which influences where you place them in a laundry nook.
- Seals and gaskets: Look for units with robust O-rings or reliable thread seals; sealing tape is often included for a tight seal.
- Warranty and certification: A manufacturer-backed warranty and safety certifications can provide confidence in long-term performance.
Value And Application
- Pack size: Multi-pack options can be cost-effective for multiple fixtures in a laundry area.
- Specific use: For washing machines, ensure the arrestor is rated for high surges and compatible with the machine’s valve dynamics.
- Noise reduction: A primary purpose is dampening hydraulic shock; consider models with stronger dampening mechanisms for noisy systems.