--- product_id: 345450151 title: "RU101 Flash Shower Rough-in Valve with Universal Inlets and Outlets, Unfinished" brand: "american standard" price: "S$78" currency: SGD in_stock: true reviews_count: 5 category: "American Standard" url: https://www.desertcart.sg/products/345450151-ru101-flash-shower-rough-in-valve-with-universal-inlets-outlets store_origin: SG region: Singapore --- # Universal inlets/outlets for versatile connections Test cap supports 300 PSI water pressure Durable cast brass valve body RU101 Flash Shower Rough-in Valve with Universal Inlets and Outlets, Unfinished **Brand:** american standard **Price:** S$78 **Availability:** βœ… In Stock ## Summary > 🚿 Upgrade your shower install game with precision and speed! ## Quick Answers - **What is this?** RU101 Flash Shower Rough-in Valve with Universal Inlets and Outlets, Unfinished by american standard - **How much does it cost?** S$78 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/345450151-ru101-flash-shower-rough-in-valve-with-universal-inlets-outlets) ## Best For - american standard enthusiasts ## Why This Product - Trusted american standard brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built to Last:** Robust cast brass body engineered for long-term water exposure and durability. - β€’ **Test with Confidence:** Integrated test cap allows high-pressure air or water testing before cartridge installation. - β€’ **Flush & Secure Mounting:** Flat back design ensures a solid, space-saving installation with cross brace support. - β€’ **Effortless Universal Fit:** Fast, adaptor-free installation with multiple connection types to reduce leak risks. - β€’ **Quick Maintenance Access:** Stainless steel retaining ring with flats enables easy cartridge and test cap removal without screws. ## Overview The American Standard RU101 Flash Shower Rough-in Valve combines universal inlet/outlet compatibility with a durable brass body and innovative test cap, enabling fast, secure, and leak-resistant installations. Designed for professional-grade plumbing with easy maintenance and high-pressure testing capabilities, it’s the go-to valve for millennial managers who demand efficiency and reliability in their home upgrades. ## Description Designed for fast and efficient installation, the Flash Shower Rough-in Valve provides flexibility for every situation. The Rough-in Valve features a flat back and compact body to ensure a secure and simplified install process that can accommodate smaller spaces. Equipped with a test cap, it allows you to install, test, and flush lines with ease. Stainless steel fixation ring, with sure-grip flats, keeps test cap and cartridge in place without screws. Cartridge sold separately. Review: Use it to replace my own one. Work well. Prime arrive on time Review: Works great with Aspirations shower faucet. No issue, works well with cartridge ## Features - Choice of Connections: Fast and easy installation without adaptors reducing leak points. Available connections include Universal (male thread/female sweat), PEX Crimp, PEX Cold expansion, CPVC, and Stub outs - Cast Brass Valve Body: Durable. Ideal material for prolonged contact with water - Flat Back: Allows valve to be mounted flush anst cross brace for easy and solid installation - Test Cap: Allows valve body to be tested and flushed without the presence of the valve cartridge. Can be tested using test cap with air (200 psi) or water (300 psi) - Stainless Steel Retaining Ring with Flats: Secures test cap/ cartridge in place and eliminates need for screws. Flats make it simple to loosen ring for quick, easy insertion/removal of test cap/cartridge.Back to Back Capability: Hot and cold can be reversed quickly and easily..Exclusive Plaster Guard: Plaster guard is designed to protect valve and act as a guide during installation. It can serve as mounting support for thin wall installations..Wide Rough in Range: From 1 3/4" to 2 3/4" from finished wall to the back of the valve. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07KXBFCL4 | | ASIN | B07KXBFCL4 | | Brand Name | American Standard | | Connector Type | Threaded, Solder | | Customer Reviews | 4.4 4.4 out of 5 stars (360) | | Customer reviews | 4.4 4.4 out of 5 stars (360) | | Date First Available | 15 September 2023 | | Exterior Finish | Stainless Steel | | Global Trade Identification Number | 00012611625299 | | Included Components | Installation Guide | | Inlet Connection Size | 0.5 Inches | | Inlet Connection Type | Cross Linked Polyethylene | | Item Dimensions | 7 x 11.3 x 9.4 centimeters | | Item Type Name | Shower Rough-in Valve with Universal Inlets and Outlets | | Item Weight | 762 g | | Item model number | RU101 | | Manufacturer | American Standard | | Manufacturer | American Standard | | Material Type | Brass | | Maximum Pressure | 300 Pound per Square Inch | | Model Number | RU101 | | Number of Ports | 4 | | Outlet Connection Size | 0.5 Millimeters | | Outlet Connection Type | PEX | | Product Dimensions | 6.99 x 11.28 x 9.37 cm; 762.04 g | | Size | 1/2 in | | Specification Met | ASME B16.34, MSS SP 72 | | Thread Size | 1/2 | | Thread Type | 1/2 inch NPT | | UPC | 012611625299 | | Unit Count | 1 Count | | Valve Type | Ball Valve | ## Product Details - **Brand:** American Standard - **Exterior finish:** Stainless Steel - **Inlet connection size:** 0.5 Inches - **Item dimensions L x W x H:** 7 x 11.3 x 9.4 centimeters - **Material:** Brass ## Images ![RU101 Flash Shower Rough-in Valve with Universal Inlets and Outlets, Unfinished - Image 1](https://m.media-amazon.com/images/I/71a75D66HZL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: I would like to use this valve for a Grohe shower system. Is it compatible to the Grohe rough valve # 35015001?** A: It won’t work with that Grohe cartridge but I can confirm that it works with the GrohSafe 3.0 48491000. I just installed this and other than the color it’s identical to the American Standard M954803 that comes with their Flash trim kits. **Q: Do they make this valve rough-in with service stops** A: You should contact AS tech support. As far as i know, no such valves. **Q: Is this 1/2 inch OD?** A: Valve is 1/2" ID made for 1/2" OD pipe **Q: which trim and cartridge are compatible with this valve?** A: Any flash kit ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***R on 4 January 2026* Use it to replace my own one. Work well. Prime arrive on time ### ⭐⭐⭐⭐⭐ Review *by J***X on 13 June 2025* Works great with Aspirations shower faucet. No issue, works well with cartridge ### ⭐⭐⭐⭐⭐ Review *by G***G on 25 June 2025* I am trying to work out the best solution for a tight retrofit and I have this rough valve along with Moen and Delta. This brand along with its trim kit is by far the beafiest and best built of the three. Its old school solid. Unfortunately its got the widest supply line connection spread so I dont know if I can make it fit but I would use these hands down in all new construction. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/345450151-ru101-flash-shower-rough-in-valve-with-universal-inlets-outlets](https://www.desertcart.sg/products/345450151-ru101-flash-shower-rough-in-valve-with-universal-inlets-outlets) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-05-19*