Help Center
AquaGuard Support Center
Everything you need to install, use and maintain your AquaGuard system.
Get the Custos Smart Home App
Monitor and control your AquaGuard system from anywhere. Receive instant alerts, view usage history and manage your water protection on the go.
Guides & resources
AquaGuard Sizing Guide
Find the right AquaGuard for your home. Work out which valve type and pipe size you have.
Open the sizing guide→Installation Guide
Step-by-step instructions for installing your AquaGuard system. No plumber required: most installs take under 15 minutes.
See the install steps→Water Leak Protection Certificate
Get an official installation certificate for your insurance provider. Many offer 5–15% discounts for water protection systems.
Request a certificate→Product Manuals
Manuals, specifications and technical documents for every AquaGuard product.
Open the manuals→FAQ
Questions homeowners ask.
How long does installation take?
Most AquaGuard installations take 10-15 minutes. No plumber or special tools required. Attach the device to your existing valve, connect to the gateway and download the app.
What pipe sizes does AquaGuard support?
AquaGuard fits pipes from 1/2" to 1-1/4" as standard. With the optional Big Clamps adapters it fits pipes up to 2". Not sure? Use the sizing guide in our Help Center.
Does AquaGuard work during power outages?
Yes. With the optional Smart Backup Battery, AquaGuard keeps protecting your home for up to 20 hours during an outage, and still shuts off the water if a leak is detected.
Do I need Wi-Fi for AquaGuard to work?
Wi-Fi is only needed during initial setup. AquaGuard runs on a secure, standalone network and will shut off the water during a leak even without Wi-Fi or power.
Can I shut off my water through the app?
Yes. The Custos Smart Home App lets you shut off your water supply remotely from anywhere.
How long do the sensors last?
AquaSensor S1 has a 10-year battery life. The system notifies you when a battery needs replacing.
Can I install AquaGuard outdoors?
Yes. AquaGuard and the Smart Backup Battery have IP66 water and dust protection with UV and thermal shielding.
Is there a monthly subscription?
No. The app and alerts are included with no subscription required.
What is the warranty?
AquaGuard comes with a 2-year warranty covering defects in materials and workmanship. Extended warranty options are available.
Still need help?
Our support team is here to help with any questions or issues.
Call us
+1 716-784-4190
Email support
support@custos.us
Chat with us on WhatsApp
Operation hours
9am – 5pm PST (Mon – Fri)
⚡ Quick response guarantee: we typically reply within 24 hours on business days.