--- product_id: 110702504 title: "1pcs Spa Hot Tub Heater Split Nut Unions" brand: "uceder" price: "£17.81" currency: GBP in_stock: true reviews_count: 13 category: "Uceder" url: https://www.desertcart.co.uk/products/110702504-1pcs-spa-hot-tub-heater-split-nut-unions store_origin: GB region: United Kingdom --- # Precise Split Nut & O-Ring Sizes 2" Heater Assembly Fit Includes Screw & Gasket 1pcs Spa Hot Tub Heater Split Nut Unions **Brand:** uceder **Price:** £17.81 **Availability:** ✅ In Stock ## Summary > 🔥 Lock in your spa’s heat with precision & style! 🔩 ## Quick Answers - **What is this?** 1pcs Spa Hot Tub Heater Split Nut Unions by uceder - **How much does it cost?** £17.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/110702504-1pcs-spa-hot-tub-heater-split-nut-unions) ## Best For - uceder enthusiasts ## Why This Product - Trusted uceder brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Optimized Fit:** Designed for 2" heater assemblies with 1.5" NPT thread size—avoid pipe size confusion for smooth install. - • **Trusted Quality:** Metal construction with 4.2-star rating from 457 spa pros and enthusiasts—upgrade your spa with confidence. - • **Perfect Compatibility:** Fits top spa heater brands like Balboa, Gecko, HydroQuip & more—excludes LX Heater. - • **Precision Engineering:** Split nut with dual inner sizes (2.3" & 3.12") ensures secure, leak-free connections. - • **Complete Installation Kit:** Includes screw and high-quality gasket/O-ring for hassle-free setup and lasting durability. ## Overview This UCEDER Spa Hot Tub Heater Split Nut Union kit includes a metal split nut with screw and a durable gasket/O-ring, engineered for 2" heater assemblies from leading brands like Balboa and Gecko. Featuring precise inner measurements and a 1.5" NPT thread, it ensures a secure, leak-proof connection for your spa heater setup. Rated 4.2 stars by 457 users, it’s the reliable upgrade your spa deserves. ## Description Here is 1 pcs Heater Split Nut Unions with Screw , 1 pcs Heater Gasket / O-ringsActual Split Nut Measurement : The inner size (back side) is 2.3 inch, the inner size (front side) is 3.12 inch.Actual Oring Measurement: The inner size is 2.08 inch, the outer size is 2.87 inch.the O-ring fits for Balboa,Gecko,HydroQuip,Spa Builders,Correctech,Spanet,not fits LX Heater,the split nut fits 2" Heater Assemblies Made by Balboa,Gecko,HydroQuip,Spa Builders,Correctech Review: Quick arrival and perfect fit. - Works like it should, hot tub up and running. Review: Best I have found! - I can't state enough how much better this is than the other black ones I have tried. The retaining side of this piece is over twice as thick making for a EZ seal. ## Features - Package Include 1 pcs Heater Split Nut Unions with Screw , 1 pcs Heater Gasket / O-rings,we suggest that make sure the size matches your project before purchasing! - Split Nut Measurement：The inner size (back side) is 2.3 inch, the inner size(front side) is 3.12inch,fits 2" Heater Assemblies,not fits LX Heater - Actual Oring Measurement：The inner size is 2.08 inch, the outer size is 2.87 inch，O-ring fits for Balboa,Gecko,HydroQuip,Spa Builders,Correctech,Spanet,not fits LX Heater - Please find the mark(1or 2) on each split nut,the same number can be matched successfully,otherwise the thread will be misaligned - Please not choose the same size as your pipe,because the same size will be too tighten to be installed. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07F3Z6TFL | | Best Sellers Rank | #157,271 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #3,663 in Pool & Spa Replacement Parts | | Brand | UCEDER | | Brand Name | UCEDER | | Color | White | | Connector Type | Union | | Customer Reviews | 4.2 out of 5 stars 454 Reviews | | Global Trade Identification Number | 06950787225650 | | Item Highlight | with Screw and 1 pcs Gasket / O-rings(Actual Size 3 Inch ,Suitable for 2 Inch Heater Assemblies) | | Item Weight | 0.11 kg | | Manufacturer | pool spa part store | | Manufacturer Part Number | 541 | | Material | Metal | | Material Type | Metal | | Model Number | 541 | | Number of Packs | 1 | | Number of Pieces | 2 | | Set Name | 1 | | Size | 2 inches | | Thread Size | 1.5 inches | | Thread Type | NPT | | Unit Count | 1 Count | ## Product Details - **Brand:** UCEDER - **Color:** White - **Connector Type:** Union - **Item Weight:** 0.11 kg - **Material:** Metal - **Number of Packs:** 1 - **Number of Pieces:** 2 - **Size:** 2 inches - **Thread Size:** 1.5 inches - **Thread Type:** NPT ## Images ![1pcs Spa Hot Tub Heater Split Nut Unions - Image 1](https://m.media-amazon.com/images/I/61yix5BkGsL.jpg) ![1pcs Spa Hot Tub Heater Split Nut Unions - Image 2](https://m.media-amazon.com/images/I/71K1YkEpunL.jpg) ![1pcs Spa Hot Tub Heater Split Nut Unions - Image 3](https://m.media-amazon.com/images/I/71nFlUdSDwL.jpg) ![1pcs Spa Hot Tub Heater Split Nut Unions - Image 4](https://m.media-amazon.com/images/I/7108trhuJhL.jpg) ![1pcs Spa Hot Tub Heater Split Nut Unions - Image 5](https://m.media-amazon.com/images/I/41TFteddqbL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quick arrival and perfect fit. *by E***L on January 12, 2026* Works like it should, hot tub up and running. ### ⭐⭐⭐⭐⭐ Best I have found! *by D***A on January 26, 2025* I can't state enough how much better this is than the other black ones I have tried. The retaining side of this piece is over twice as thick making for a EZ seal. ### ⭐⭐⭐⭐⭐ Stumps garage on you tube *by E***P on August 1, 2025* Works great ## Frequently Bought Together - UCEDER 1pcs Spa Hot Tub Heater Split Nut Unions with Screw and 1 pcs Heater Gasket/O-rings(Actual Size 3 Inch,Suitable for 2 Inch Heater Assemblies) - UCEDER 2 Pack Spa Hot Tub Heater Split Nut Unions with Screw, 2 pcs Heater Gasket/O-Rings,(Actual Size 3 Inch,Suitable for 2 Inch Heater Assemblies) --- ## 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.co.uk/products/110702504-1pcs-spa-hot-tub-heater-split-nut-unions](https://www.desertcart.co.uk/products/110702504-1pcs-spa-hot-tub-heater-split-nut-unions) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-10-18*