Thos. Somerville Co.
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Claim This BusinessAbout Thos. Somerville Co.
Thos. Somerville Co. has served the Washington, DC metro area since 1865, making it one of the region's oldest continuously operating plumbing supply distributors. The company holds a 4.1-star rating from 36 customer reviews and operates Monday through Friday from 6:30 AM to 4:30 PM from its DC location at (202) 635-4177. While primarily serving licensed plumbing and HVAC contractors, the company also supports DIY homeowners with account access to their extensive parts inventory through their website at tsconline.com.
What distinguishes Thos. Somerville Co. from typical supply houses is their comprehensive account management system and real-time inventory tracking. Customers can search by postal code to check stock at their Central Distribution Warehouse, create quotes, and manage orders through their online portal. The company requires account registration for pricing access, with invoice numbers and account details available on statements and packing slips, a system designed for contractors managing ongoing projects but accessible to verified homeowners.
Reviewers frequently mention the reliability of ordering through their platform, with customers noting the ability to check inventory before making the trip to their Washington, DC location. One reviewer referenced specific part numbers and their availability, highlighting the company's role in supporting both professional contractors and homeowners undertaking plumbing projects.
What Customers Say
The 36 reviews averaging 4.1 stars reflect generally positive experiences with product availability and account service. Customers appreciate the real-time inventory system and the ability to verify stock before visiting, though some mention the account registration requirement adds a step for first-time DIY customers.
Working Hours
| Sunday | Closed |
| Monday | 6:30 AM–4:30 PM |
| Tuesday | 6:30 AM–4:30 PM |
| Wednesday | 6:30 AM–4:30 PM |
| ThursdayToday | 6:30 AM–4:30 PM |
| Friday | 6:30 AM–4:30 PM |
| Saturday | Closed |
Services
Plumbing Parts Distribution
Wholesale distribution of plumbing parts, valves, fittings and related supplies to contractors and verified homeowners.
HVAC Supplies
HVAC-related components and equipment available through their commercial distribution network.
Online Account Management
Web portal for creating quotes, checking inventory, tracking orders and managing customer accounts.
Real-Time Inventory Tracking
Website search function checking stock at Central Distribution Warehouse by postal code.
Will-Call Pickup
Customer pickup of ordered or in-stock parts at their Washington, DC location.
Customer Account Verification
Account creation service using invoice numbers or existing customer account numbers for online access.