The Volcano Drain is the most versatile drain on the market with its ability to fit in 4″, 3″, 2″, & 1.5″ drain openings. Simply cut a 4″ hole in a sump cover & install the Volcano Drain for an airtight seal that doubles as an access port. The recessed lip design helps to collect multiple drain lines & the grill on top can be removed for cleaning as needed. Designed by radon professionals!

• 4″, 3″, 2″, 1-1/2″ all in one
• No caulk sump install (becomes 4″ access port)
• Recessed lip to collect multiple drain lines
• Shallow depth 2-1/4″ (1-3/4″ when reduced to smaller diameter)
• No vacuum loss
• Made in USA