Do Countertop Installers Do Plumbing? Who Disconnects the Sink
Do countertop installers do plumbing? No, at Cornerstone countertop installers do not do any plumbing, and many fabricators work the same way. We set your kitchen sink into the new countertop, but disconnecting and reconnecting the sink, faucet, disposal, dishwasher and water lines is done by a qualified plumber. You book two short plumber visits: one before tear-out and one after installation.
Summary
- We set the kitchen sink into the countertop; we don't connect it.
- Your plumber disconnects before tear-out and reconnects after installation.
- We give you both dates as soon as template is scheduled.
- Undermount sinks may need a drain height check by your plumber.
Who Does What on Installation
The split is simple: we handle the stone and setting the sink into it; your plumber handles anything with water or drains.
| Task | Cornerstone | Your plumber |
|---|---|---|
| Disconnect sink, faucet, disposal | No | Yes, before tear-out |
| Disconnect dishwasher | No | Yes, before tear-out |
| Remove old countertop | Yes, if on your quote | No |
| Cut sink opening, set the sink | Yes | No |
| Drill faucet holes | Yes | No |
| Reconnect water, drain, appliances | No | Yes, after installation |
Why Countertop Installers Leave Plumbing to Plumbers
Plumbing connections carry water and waste under pressure, and a bad connection can cause hidden damage. Qualified plumbers carry the right parts, know local code and stand behind their connections. Keeping the two trades separate means each is done by the specialist responsible for it.
How to Schedule Your Plumber Around Us
As soon as your template date is set, we give you the tear-out and installation dates. Book your plumber for the morning of tear-out, or the day before, and for after installation on installation day or the next day.
Tell Your Plumber About Sink Changes
Switching from a drop-in to an undermount sink, or to a farmhouse sink, can change the drain height. Let your plumber know in advance so they bring the right parts.
More Help Planning Your Installation
See our guide on how to prepare for countertop installation for the full checklist and the countertop installation timeline for every date. Learn how our process works, or browse all countertop buying guides.
Frequently Asked Questions
Do countertop installers hook up the sink?
At Cornerstone, no. We set the sink into the countertop; your plumber connects it.
Who disconnects the dishwasher?
Your plumber, before the old countertop is removed.
Do you install the faucet?
We drill the faucet holes; your plumber installs and connects the faucet.
Can I use the kitchen sink the day of installation?
No. Your plumber can reconnect it 24 hours after the installation time, and then it is ready to use.
Do you recommend a plumber?
No. We don't recommend plumbers, so please book your own plumber. We give you the template and installation dates early so you can schedule the disconnect and the reconnect.
