Wm. G. Cocos Plumbing Co., St. Louis, MO: Backflow Testing

Certification

✓ On Missouri's certified backflow tester roster Phone matches its Google profile

Certified tester	Certificate	Expires
Joseph Robinson	06-11320	March 2029
Jason Schopp	06-10919	May 2027
Joseph D. Cocos	06-7191	April 2027

From the Missouri Department of Natural Resources roster, read October 6, 2026. The roster lists people, not companies; these are the certified testers it lists for this business. Ask which tester will do your test, and your utility may also require the tester to be registered with it.

Call (314) 631-2688 Visit website More testers in Missouri

Where you will find Wm. G. Cocos Plumbing Co.

These are the city pages close enough for this business to appear on.

Other backflow testers nearby

Business	Services	Distance
Lemay Plumbing, Inc.	Backflow Testing	under 1 mi
Bieg Plumbing	Backflow Testing	1 mi
RA Guinner Plumbing	Backflow Testing	2 mi
Kardell Plumbing	Backflow Testing	2 mi
Haberberger Mechanical	Backflow Testing	2 mi
Mertens Service Inc.	Backflow Testing	3 mi

Questions about Wm. G. Cocos Plumbing Co.

Is Wm. G. Cocos Plumbing Co. licensed?

Yes. Missouri records showed an active certificate (#06-10919) when we last checked in Oct 2026. Ask to see it before work starts, since a certificate can lapse between checks.

What does Wm. G. Cocos Plumbing Co. do?

Their listing covers backflow testing. Call to confirm the service you need, because offerings change.

What areas does Wm. G. Cocos Plumbing Co. serve?

They are based in St. Louis, Missouri, within driving distance of St. Louis, Webster Groves, Kirkwood, Fenton, Arnold. Service areas are set by the business, so confirm yours when you call.

How do I reach Wm. G. Cocos Plumbing Co.?

Call (314) 631-2688. Their website is linked on this page.

Is this your business?

Claim this listing free: add the utilities you file with, your service area and your residential test price, and get annual test-due requests from property owners.

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