Description
Second Stage Propane Regulator for the Two-Stage Heater System
Product Overview
The first stage regulator delivers 10 PSI from the propane tank. The heater manifold tolerates only 14 in. water column. Feed it 10 PSI, and you damage the manifold regulator. The Frost Fighter 50274A is a second-stage propane regulator that drops 10 PSI to 11 in. water column. This Frost Fighter 2nd stage regulator completes the pressure chain so the burner gets stable gas.
Key Features and Benefits
- This Frost Fighter 2nd stage regulator has 3/4 in. FNPT connections on both ports. The 2,000,000 BTU capacity covers every IDF and DF400 heater with room to spare.
- A built-in internal relief valve protects the downstream system against overpressure. For installations above the regulator's relief capacity, add a separate relief valve downstream.
- The 50274A works on both propane and natural gas. On propane, pair it with the 50276A first stage. On natural gas at 1 to 10 PSI supply, this 2nd stage LP gas regulator is the only external regulator the heater needs.
- Factory set at 11 in. water column. The outlet is adjustable within the low-pressure propane regulator range to match the heater's intake requirement.
How the 50274A Fits the Two-Stage System
On propane, the 50276A first stage regulator at the tank drops pressure from up to 250 PSI to 10 PSI. The 50274A second stage propane regulator then takes 10 PSI and brings it to 11 in. water column. As a 2nd stage LP gas regulator, the 50274A feeds the heater's manifold regulator, which sets the final burner pressure from there.
On natural gas, the setup depends on supply pressure. If NG supply is already at 7 to 14 in. water column, no external regulator is needed. If supply is 1 to 10 PSI, the 50274A handles the full drop on its own as a natural gas regulator. No first stage required.
All piping must follow CSA B149.1 in Canada or NFPA 54 in the United States.
Which Heaters Use It
This Frost Fighter 2nd stage regulator fits all IDF and DF400 heaters on propane or natural gas. Cleanflow stocks the IDF350 and IDF500. IHS700 heaters use a different regulator system (70093B). The DF1500 uses its own manifold regulation.
Specifications
| Spec | Value |
|---|---|
| Frost Fighter Part | 50274A |
| Type | 2nd stage LP/NG regulator |
| Connections | 3/4 in. FNPT inlet x 3/4 in. FNPT outlet |
| Max Inlet Pressure | 10 PSIG |
| Outlet Pressure | 11 in. W.C. factory set |
| Adjustment Range | 6 to 16 in. W.C. |
| Capacity | 2,000,000 BTU |
| Safety | Internal relief valve (limited capacity) |
| Operating Temp | -20 to 150 F |
| Weight | 2 lbs assembled |
| UPC | 400027002443 |
| Country | United States |
| Fits | IDF and DF400 heaters on LP or NG (IHS700: use 70093B) |
| Companion (Propane) | 50276A 1st Stage Regulator (required for LP) |
Buy Second Stage Propane Regulator Online from Cleanflow
Cleanflow Utility Supply Company is an authorized Frost Fighter dealer and stocks this Frost Fighter 2nd stage regulator along with other Frost Fighter heater parts and Frost Fighter heaters and accessories.
Free shipping on orders over $199. Returns accepted within 30 days; email info@cleanflow.ca. Ships across Canada and the USA. Call 1-866-335-1078 to confirm your heater model.
Frequently Asked Questions
What does a second stage propane regulator do?
A second stage propane regulator takes the intermediate pressure from a first stage regulator (typically 10 PSI) and drops it to the low pressure propane regulator range the heater needs, usually around 11 in. water column. Without it, the heater manifold receives more pressure than it can handle.
What pressure should a second stage propane regulator be set at?
The 50274A ships factory-set at 11 in. water column. The adjustment range is 6 to 16 in. water column. Leave it at the factory setting unless a licensed gas technician determines a different set point for your heater.
Do you need a second stage regulator for natural gas?
It depends on supply pressure. If your natural gas regulator delivers 7 to 14 in. water column, the heater takes it directly. If supply is 1 to 10 PSI, the 50274A drops it to the correct range. Propane always requires both stages.
Where should a second stage propane regulator be installed?
Install the 50274A near the heater, downstream of the first stage, with the vent pointed down. This propane gas regulator and all piping must follow CSA B149.1 or NFPA 54. The 50274A is one of the Frost Fighter heater parts a licensed gas fitter can install without modifying the heater.
Can I use a second stage regulator without a first stage?
On natural gas at 1 to 10 PSI, yes. This Frost Fighter 2nd stage regulator handles the full pressure drop alone. On propane, no. Propane tank pressure reaches up to 250 PSI, far beyond the 50274A's 10 PSI maximum inlet. You need the 50276A first stage at the tank.
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