That small spigot near the bottom of your water heater is the drain valve — used for flushing sediment and draining the tank. Factory-installed plastic drain valves are notorious leakers: they crack, their washers harden, and once they start dripping they rarely stop. The fix is simple and permanent: replace it with a full-port brass ball valve.
We do this swap constantly across DeSoto, and we always take the opportunity to flush accumulated sediment while the tank is accessible. A brass valve seals tighter, drains faster, and makes every future flush easier — which matters a lot in our sediment-heavy water.
Active leak, no hot water, or gas smell — don't wait. Call Emergency Line
Drain down: the tank is safely drained to below the valve level.
Swap: the plastic valve comes out; a full-port brass ball valve goes in with proper thread sealant.
Flush & test: sediment flushed, tank refilled, valve tested drip-free under pressure.
Storm-season note: a working drain valve matters most before flood season. If storm runoff ever reaches a garage-installed heater, being able to drain the tank quickly is part of safe emergency handling — we verify every valve we touch operates smoothly.
| Service | Typical Range |
|---|---|
| Drain valve diagnosis / service call | $89–$149 |
| Drain valve replacement (brass) | $150–$275 |
| Tank flush add-on | $150–$275 |
Ranges are representative market estimates for the DeSoto area and can vary by unit size, access, and parts. Final pricing is confirmed on-site before any work begins. Owner to verify.
Gentle tightening sometimes slows it, but cracked plastic and hardened washers don't heal. Overtightening usually cracks it worse. Replacement is the reliable fix.
Brass ball valves seal positively, resist heat cycling, and survive sediment flushes for decades. Plastic valves are a repeat-service waiting to happen.
Yes — with the tank already drained down, a sediment flush is the natural add-on and we recommend it, especially if it's been years.
Common and fixable. Don't force the broken stub — call us and we'll extract it cleanly without damaging the tank threads.
We also serve Cedar Hill, TX, Duncanville, TX, Lancaster, TX, Glenn Heights, TX, Red Oak, TX, Ovilla, TX and all surrounding areas. Back to the DeSoto water heater leak repair homepage.
Water heater drain valve dripping in DeSoto, TX? We swap cheap plastic valves for full-port brass. One call gets you a real dispatcher and upfront pricing.
Call (833) 713-2101