--- product_id: 330178595 title: "Waterway Plastics Pump Union, WW, 2\" FPT x 2\" s" brand: "waterway" price: "¥4181" currency: JPY in_stock: true reviews_count: 5 category: "Waterway" url: https://www.desertcart.jp/products/330178595-waterway-plastics-pump-union-ww-2-fpt-x-2-s store_origin: JP region: Japan --- # Fits 2" Schedule 40 PVC & Waterway pumps 2" Female Buttress Thread ~3" actual 2" Union Nut + Slip Tailpiece combo Waterway Plastics Pump Union, WW, 2" FPT x 2" s **Brand:** waterway **Price:** ¥4181 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your pump game with precision and durability! ## Quick Answers - **What is this?** Waterway Plastics Pump Union, WW, 2" FPT x 2" s by waterway - **How much does it cost?** ¥4181 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/330178595-waterway-plastics-pump-union-ww-2-fpt-x-2-s) ## Best For - waterway enthusiasts ## Why This Product - Trusted waterway brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Plastic Build:** Robust plastic construction resists brittleness and wear, ideal for long-term pond and spa use. - • **Universal Compatibility:** Works seamlessly with 2" schedule 40 PVC piping and select Waterway pump models—ditch overpriced, model-specific parts. - • **Precision Fit, No Guesswork:** Designed to perfectly match Waterway side discharge spa pumps and filters—check your manual to avoid surprises. - • **Oversized Thread for Secure Seal:** Actual 2" female buttress thread measures nearly 3", ensuring a tight, leak-proof connection. - • **Easy Installation with O-Ring Seal:** Includes slip tailpiece and O-ring for quick, reliable assembly that keeps your system leak-free. ## Overview The Waterway Plastics Pump Union (2" FPT x 2" slip) is a durable, oversized union nut and tailpiece set designed for 2" schedule 40 PVC and Waterway side discharge spa pumps. Featuring a nearly 3" female buttress thread for a secure fit and an O-ring for leak prevention, this plastic union ensures reliable, long-lasting performance for pool, pond, and spa systems. ## Description Waterway 2" Filter or Pump Union Nut and 2" Slip Tailpiece, Part Number 400-5570. Fits select Waterway Filter and Pumps, check your manual to ensure proper fit. 2” Union Nut with 2” Slip Tailpiece and O-Ring (ACTUAL SIZE IS LARGER THAN SIZE LISTED) and 2" Buttress thread on Union Nut actually measures almost 3". For 2" schedule 40PVC. Union fits Waterway Side Discharge Spa pumps. Review: Perfect match to the old ones we replaced. - Worked great for our koi pond filter. Old ones were getting brittle. Review: Works great! - A hot tub vendor quoted me a hilarious price saying these parts are specific to the model and no longer made. Turns out that was wrong. Worked great! ## Features - PLEASE check your manual to ensure proper fit. - 2” Union Nut with 2” Slip Tailpiece and O-Ring (ACTUAL SIZE IS LARGER THAN SIZE LISTED) - 2" Female Buttress Thread on Union Nut actually measures almost 3". ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00L2MPIMU | | Brand | Waterway | | Brand Name | Waterway | | Color | Black | | Colour | Black | | Connector Type | Union | | Connector type | Union | | Customer Reviews | 4.4 out of 5 stars 542 Reviews | | Item Dimensions | 9.9 x 8.6 x 4.3 centimeters | | Item Weight | 0.15 Pounds | | Item dimensions L x W x H | 9.9 x 8.6 x 4.3 centimeters | | Manufacturer | Waterway | | Manufacturer Part Number | 400-5570 | | Material | Plastic | | Material Type | Plastic | | Model Number | 806105081957 | | Number of Packs | 1 | | Number of Pieces | 1 | | Set Name | Waterway 2-Piece Union Nut and Tailpiece Set | | Size | 2 inches | | Thread Type | Buttress | | UPC | 806105081957 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Waterway - **Color:** Black - **Item Weight:** 0.15 Pounds - **Manufacturer:** Waterway Plastics - **Material:** Acrylonitrile Butadiene Styrene (ABS), Polypropylene (PP) - **Power Source:** Ac/dc - **Product Dimensions:** 3.9"L x 3.4"W x 1.7"H - **Style:** Above Ground - **UPC:** 806105081957 ## Images ![Waterway Plastics Pump Union, WW, 2" FPT x 2" s - Image 1](https://m.media-amazon.com/images/I/51eFmXaGf3L.jpg) ![Waterway Plastics Pump Union, WW, 2" FPT x 2" s - Image 2](https://m.media-amazon.com/images/I/31MBXSsbt9L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect match to the old ones we replaced. *by D***B on 13 April 2026* Worked great for our koi pond filter. Old ones were getting brittle. ### ⭐⭐⭐⭐⭐ Works great! *by M***N on 13 July 2026* A hot tub vendor quoted me a hilarious price saying these parts are specific to the model and no longer made. Turns out that was wrong. Worked great! ### ⭐⭐⭐⭐⭐ Great *by T***M on 5 November 2025* Worked for my application. Fits my hot tub pump motor, got two oring gaskets, and fit 2 inch pvc tubing. Can’t complain. Would order again for my secondary pump in the future ## Frequently Bought Together - Waterway Plastics Pump Union, WW, 2" fbt x 2" s - Valterra 2201X PVC Unibody Gate Valve, Silver, 2" Slip w/Gate Keeper - Waterway Plastics 806105082107 2" s x 2" fbt 90-Degree Sweep Pump Union --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/330178595-waterway-plastics-pump-union-ww-2-fpt-x-2-s](https://www.desertcart.jp/products/330178595-waterway-plastics-pump-union-ww-2-fpt-x-2-s) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-08*