iouxvt WP3360977 Washing Machine Vacuum Break (3360977) — Anti-Siphon Water Inlet, Direct OEM Replacement

The iouxvt WP3360977 is a direct-replacement washer vacuum break (water inlet siphon) designed to stop backflow and keep your washing machine’s water supply clean and functioning.

If your washer is drawing water improperly, allowing dirty water to return to the supply, or you’re seeing erratic filling behavior, the vacuum break (also known as a water inlet siphon) is often the culprit. The iouxvt WP3360977 matches common OEM references and fits a wide range of Whirlpool models. It restores anti-siphoning protection, helps maintain proper water flow, and is sized for a straightforward swap with compatible machines.

How does the WP3360977 prevent dirty water from re-entering my home plumbing?

This part is an anti-siphon device installed in the washer’s inlet system to block reverse flow. When functioning, it permits fresh water entry but prevents contaminated wash water from being drawn back into the incoming water lines.

• Built as a vacuum break/water inlet siphon to stop backflow
• Installs inline with the washer’s fill/nozzle assembly for reliable protection
• Matches several OEM reference numbers for compatibility verification

Will this WP3360977 fit my washer model and how do I verify compatibility?

iouxvt lists the WP3360977 as compatible with many Whirlpool model codes and alternate part numbers. Confirm fit by comparing your appliance model or your old part’s number to the provided references before ordering.

• Cross-references include 3360977, 387606, 2845, PS11741230, AP6008099 and others
• Specific compatible Whirlpool model lists are supplied with the product details
• Note: this item does not replace part 3347034—double-check numbers

How difficult is installation and what tools or steps are required?

Installation is straightforward for someone comfortable with basic appliance work. It requires disconnecting power, removing the control panel and cabinet access, unplugging connectors, replacing the inlet assembly, and reassembling the washer.

• Power must be disconnected before starting for safety
• Tools needed: screwdriver set and possibly pliers to remove panels and fasteners
• Follow reassembly in reverse order and confirm secure wire connections

What are the key physical details and performance benefits of this part?

The physical dimensions and design support a precise fit in compatible washers and deliver consistent anti-siphon performance. Using a correct replacement part reduces the risk of contamination and helps the washer maintain reliable fill cycles.

• Overall dimensions: approximately 6.85" long × 5.87" wide × 3.15" high
• Manufactured to replace several OEM numbers for broad interchangeability
• Improves hygiene by preventing backflow and supports reliable water flow

Who is this for: The iouxvt WP3360977 vacuum break is intended for homeowners, appliance technicians, and repair shops needing a dependable replacement anti-siphon inlet for compatible Whirlpool washers. Choose this part if your machine shows fill irregularities, you’ve identified a failed inlet siphon, or you want to restore proper backflow protection—verify your model number and the listed cross-references before purchase.