Red Seal Neptune 86646-000 Thermostat Bellows for 1-1/4″, 1-1/2″ & 2″ Valves

SKU: 86646-000

Weight	5 lbs
Dimensions	12 × 10 × 7 in

$1,550.26

In stock — available to order.

Sold individually. Each quantity ordered is one unit. Kits are one complete kit; products sold by length use the stated length unit.

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$1,550.26	0%
5–9	$1,472.75	5%
10+	$1,395.23	10%

Estimate for this quantity before shipping. Tax display follows store settings. Existing cart quantities can increase the tier. Only one offer applies; a coupon replaces automatic pricing. For 20+ units, contact support for a quote.

Available to order.

Bulk quantity & quote

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Red Seal Neptune 86646-000 Thermostat Bellows for 1-1/4", 1-1/2" & 2" Valves

Specifications & product details

REGIONS SUPPLY BUYING GUIDE

Product details & buying advice

Identify both the meter and register before selecting measurement-system parts; the required configuration can extend beyond the meter body.

Product type	Meters, registers and meter service parts
Part / SKU	86646-000

What to check before ordering

Record model numbers, displayed units and the specified register drive ratio.
Identify the part’s role in the body, strainer, differential valve, register or temperature-compensation assembly.
Have qualified meter-service personnel handle the work and any necessary calibration.

Service reminder: Plan a measurement check after changes to gears, registers or temperature-compensation parts, following the model’s setup procedure.

Have gas-system installation and service completed by qualified personnel. Use the current instructions for the exact model and the requirements that apply at the installation location.

Product help & manufacturer resources

Explore this product guide · Shop this product group · Ask Regions Supply about this part

Overview

The Red Seal Neptune 86646-000 Thermostat Bellows is a genuine OEM replacement part designed for use in thermostatic valve assemblies across 1-1/4", 1-1/2", and 2" sizes.

Key Benefits:OEM Fit: Direct replacement for Red Seal Neptune thermostat valve assemblies, ensuring compatibility and reliable sealing.

Durable Construction: Made from heavy-duty alloy materials for long service life in demanding propane, LPG, and petroleum environments.

Temperature-Responsive: Provides accurate valve response over a wide operating range to maintain system safety and performance.

Applications

Ideal for use in bulk propane plants, LPG fueling stations, and petroleum transfer systemsrequiring precise thermostatic valve control.
This thermostat bellows assembly is an essential service part for technicians maintaining industrial gas and fuel transfer systems, ensuring long-lasting performance and compliance.

Product details

Part / SKU	86646-000

Package includes

Red Seal Neptune 86646-000 Thermostat Bellows for 1-1/4", 1-1/2" & 2" Valves

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.

Compatibility & part-number help

Match the manufacturer part number and equipment model to the listing. Check connection sizes, fuel type, pressure or capacity, voltage and dimensions where applicable. A similar appearance or part number alone does not confirm compatibility.

For help, send a parts inquiry with the part number, equipment model, label photos and quantity. Manufacturer documents and item-specific information, when supplied, are in the product details above.

Shipping & availability

Availability may include our inventory and supplier sources. Listed stock does not by itself confirm immediate dispatch. Ask us to confirm a ship date before ordering for time-sensitive work.

Shipping methods and charges appear at checkout where available. Freight, oversized and specially handled items may require a quote. See our Shipping Policy for processing periods, restrictions and delivery information.