Boshart FIN1436-251 Insulated ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3.42
Boshart FIN1436-251 Insulated x MPT Dielectric Nipple, 1-1/2" x 2"

Boshart FIN1436-251 Insulated x MPT Dielectric Nipple, 1-1/2" x 2"

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Model: FIN1436-251

In Stock (leaves warehouse same day if ordered before 3pm ET)

$3.42
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Boshart FIN1436-251 Insulated x MPT Dielectric Nipple, 1-1/2" x 2"

The Boshart FIN1436-251 is an insulated dielectric nipple built for plumbers and contractors who need to isolate dissimilar pipe materials at a rough-in connection. This fitting transitions from a 1-1/2" insulated female connection to a 2" MPT (male pipe thread) end, making it a practical choice for water heater hookups and other transitions where an electrically isolating fitting is required between piping systems. As with all Boshart insulated nipples, the internal insulating liner is designed to help prevent galvanic corrosion at the joint where two different pipe materials meet, a common failure point in mixed-material plumbing systems. Because this is a rough-in / behind-the-wall style fitting, it is intended to be installed by a licensed plumber or contractor as part of a larger supply or water heater connection assembly, not as a finished, visible component.

Key Features

  • Trade Size: 1-1/2" insulated connection x 2" MPT end for transitioning between differently sized supply lines.
  • Insulated Design: Internal insulator helps electrically isolate the connection, reducing the risk of galvanic corrosion where dissimilar metals or pipe materials meet.
  • MPT Connection: 2" male pipe thread end allows for a direct threaded connection into female-threaded fittings, valves, or water heater ports.
  • Rough-In Application: Designed for behind-the-wall or mechanical room installation as part of a supply line or water heater connection assembly.
  • Boshart Build Quality: Manufactured by Boshart Industries, a supplier focused on plumbing rough-in and connection products for the trade.

Technical Specifications

  • Trade Size: 1-1/2" Insulated x 2" MPT
  • Connection Type: Insulated x Male Pipe Thread (MPT)
  • Brand: Boshart
  • Model: FIN1436-251

Typical Applications

  • Water Heater Supply Connections
  • Transitions Between Dissimilar Pipe Materials
  • Residential and Commercial Rough-In Plumbing
  • Mechanical Room and Utility Piping Assemblies
  • New Construction and Renovation Plumbing

Why Boshart?

Boshart Industries builds insulated connection fittings intended to help plumbers manage the risks that come with joining dissimilar pipe materials at a single connection point. The FIN1436-251's insulated 1-1/2" x 2" MPT configuration gives contractors a dedicated transition piece for rough-in and water heater connection work, backed by Boshart's focus on plumbing supply and connection products for the trade.

Manufacturer Resources

Product Specs

list_batch:
BOS-20260923
Product Type:
Dielectric Nipple
Connection Type:
Insulated x MPT
Department:
Plumbing
Product Subgroup:
Fittings and Valves
Product Size:
1-1/2" x 2"
Product Group:
Fitting

Boshart FIN1436-251 – Frequently Asked Questions

1) What does the 1-1/2" x 2" mean on the Boshart FIN1436-251 dielectric nipple?
Two different ends. The Boshart FIN1436-251 has a 1-1/2 inch insulated connection on one end and a 2 inch male pipe thread (MPT) on the other, so it both transitions size and isolates the joint. If you need the same size on both ends, this is not the part.
2) Why use a dielectric nipple instead of a plain steel or brass nipple at a water heater?
A plain nipple lets two dissimilar metals touch directly, and that joint corrodes galvanically. The FIN1436-251 carries an internal insulating liner that electrically isolates the connection, which is why it goes in at the transition point where copper meets steel on a water heater or supply line. Use a standard nipple only where both sides are the same material.
3) Can I use this dielectric nipple on a 1-1/2 inch threaded outlet?
Not on the threaded side. The 1-1/2 inch end is the insulated connection, not a pipe thread; the threaded end is 2 inch MPT. For a 1-1/2 inch female threaded outlet you need a nipple whose MPT end is 1-1/2 inch.
4) Will the 2 inch MPT end thread straight into a water heater port or a female fitting?
Yes. The 2 inch male pipe thread end screws directly into female-threaded fittings, valves or water heater ports, no adapter needed as long as the female side is 2 inch NPT.
5) What is the correct Boshart part number to order for a 1-1/2 inch insulated x 2 inch MPT dielectric nipple?
Boshart FIN1436-251. That is the manufacturer part number for the 1-1/2 inch insulated x 2 inch MPT configuration, and it is ordered as a single item.
6) Is this a finish fitting or a behind-the-wall part?
Rough-in only. The Boshart insulated nipple is meant for behind-the-wall or mechanical room work as part of a supply or water heater connection assembly, not as an exposed, finished component. Plan on a licensed plumber setting it as part of the larger assembly.
How fast can I get the Boshart FIN1436-251 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Boshart FIN1436-251 come with a warranty?
Absolutely. The Boshart FIN1436-251 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Boshart FIN1436-251?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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