Pitless Adapters | Merrill Manufacturing

Pitless Adapters Built to Last

Shop Pitless Adapters
No-Lead Brass & Stainless Steel
Positive Seal Inside and Outside of Casing for Long Service Life
Trusted by Well Professionals
No-Lead brass pitless adapter
No-Lead Brass
Stainless steel pitless adapter
Stainless Steel
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Pitless Adapter Quick Decision Guide
Quick Decision Guide

Find the Right
Pitless Adapter Fast

Choose by material, size, and application — then order with confidence.

No-Lead brass pitless adapter

No-Lead Brass Pitless Adapters

Best for most residential well systems.
  • Most common choice for residential wells
  • Durable no-lead brass construction
  • Positive seal below the frost line
  • Available in common sizes
  • Male part can be reversed for installation with casing
Shop No-Lead Brass →
Stainless steel pitless adapter

Stainless Steel Pitless Adapters

Best for corrosion resistance and long service life.
  • Excellent corrosion resistance
  • Stainless steel construction
  • Built for harsh water conditions
  • Available in common sizes
  • Male part can be reversed for installation with casing
Shop Stainless Steel →
Pitless Adapter Customer Reviews
Customer Reviews

Pitless Adapter Reviews

See what customers are saying about Merrill Pitless Adapters.

David R.

✓ Verified
February 24, 2026
★★★★★
Perfect for application.
Item type
1" Drop x 1" Discharge / 1.8" / 5"–8" Support 800'

Thorsten Mollmann

✓ Verified
June 19, 2026
★★★★★
Great quality. Very well made and even packed well. The silicone/rubber washers were a perfect fit.
Item type
1-1/4" Drop Pipe & Discharge

Mike Cheney

✓ Verified
April 27, 2026
★★★★★
Merrill MFG has really good-quality, durable products!
Pitless Adapter Questions and Product Guide
Pitless Adapter Guide

Common Questions

What does a pitless adapter do?

A pitless adapter connects the submersible pump drop pipe to the underground water line leading to the home.

Why does my well need a pitless adapter?

It allows water to exit the well below the frost line, helping protect the water line from freezing.

Where is a pitless adapter installed?

It is installed through the well casing below the frost line.

Can a pump be pulled with a pitless adapter?

Yes. A pitless adapter installed in a 5-inch well casing or larger allows the pump and drop pipe to be pulled without digging up the female portion of the adapter.

How do I know what size pitless adapter I need?

Match the adapter to your well casing size, drop-pipe size, discharge-line size, and pump configuration.

When should I replace a pitless adapter?

Replace it if it is leaking, corroded, difficult to service, damaged, or incorrectly sized for the well system.

Pitless Adapters

Move Water Out Below the Frost Line

Shop Pitless Adapters →

Merrill pitless adapters create a secure connection between the well casing, pump drop pipe, and underground water line. This helps keep the system serviceable while protecting the water line from freezing.