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CGI-6 - 117,000 BTU Output Cast Iron Boiler, Spark Ignition - Series 4 (LP Gas)
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381-359-022 has been discontinued
Discontinued December 11, 2025
This product was discontinued by the manufacturer.
MANUALS (4)
This item replaces: 381-357-914
Schematic Feature!
Replacement Parts
Direct Replacement:
CGI-6 - 117,000 BTU Output Cast Iron Boiler, Spark Ignition w/ Taco 007 Circulator - Series 5 (LP Gas)
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VIEW REPLACEMENT
Product Highlights
–
117000 Max BTUs
Propane
Power Vent, Stainless Steel
20 Year (Heat Exchanger)/ 2 Year (Parts) Warranty
Hydronic (Water)
19" Width
Description
–
Heating equipment must be installed, commissioned, and serviced by a licensed and qualified professional in accordance with manufacturer instructions, applicable codes, and industry standards. Manufacturers do not accept warranty or technical support requests from homeowners or unlicensed individuals. All warranty and technical inquiries must be initiated by the licensed professional responsible for the installation.
Note: Product Title reflects this boiler's IBR Net Output Rating
CGi Gas Boiler Series 4
Note: Product Title reflects this boiler's IBR Net Output Rating
CGi Gas Boiler Series 4
- Gas fired water boiler with cast iron sections
- Natural draft and direct exhaust capability
- Can be used with natural or propane gas
- Now with built-in low water cut off functionality
- Compact design saves valuable living space
- No vertical draft hood and no mechanical vent damper
- Intermittent electronic ignition with standard components for easy servicing
- 84% AFUE
- US Department of Energy 2021 Compliant
Specs
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| Application: | Heating |
|---|---|
| Fuel Type: | Propane |
| Efficiency: | 84% |
| Water Connection: | 1-1/4" |
| Gas Connection: | 1/2" |
| Vent Size: | 5" |
| System Type: | Hydronic (Water) |
| Vent Type: | Power Vent Stainless Steel |
| Width (Inches): | 19" |
| Height (Inches): | 28.375" |
| Depth (Inches): | 23-1/4" |
| Features: | EI/Spark Ignition |
| Boiler Type: | Standard |
| BTU Input: | 158000 |
| DOE Rating: | 135000 |
| IBR Rating: | 117000 |
| Warranty: | 20 Year (Heat Exchanger)/ 2 Year (Parts) |
| BTU Output: | 117000 |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
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Use Our CalculatorYou May Also Need
CGI-6 PIL (S4)
Replacement Parts
SKU: 381-359-022
Brand: Weil-McLain
Search Parts:
SEARCH PARTS
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Replacement Part, SKU
460-003-017
Sorry, we don't currently sell this item. Request This Item
Collector Hood and Transition Assembly
381-359-290
Sorry, we don't currently sell this item. Request This Item
Replacement Section Assembly
321-114-363
Sorry, we don't currently sell this item. Request This Item
Need help finding a replacement part?
Fill out the part request form and someone will get back to you shortly.
PART REQUEST FORM
Product Reviews
5 out of 5 reviews
100% would recommend this product
5 star
100%
4 star
0%
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2 star
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1 star
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Showing 1-5 of 5 reviews
Nothing beats a Weil Mclain
I replaced my 35 year old Weil Mclain oil fired boiler with a CGI natural gas boiler 3 years ago and it is amaizing! Like someone else said, just turn the stat and you have heat. It does have one drawback. The stack noise when the exhaust blower is on is pretty loud. I was warned but thought it was worth the risk. So any suggestions on how to reduce this noise would be most appreciated.
One other small thing; The other morning, I heard the boiler short cycle over and over again. I quickly found out it was a $31 air pressure switch which was very visible and easy to replace. Just remove the front panel, look for the double -1/4" tubes and replace the pod they are connected to. Still very satisfied!
Chick
Toms River, NJ
10 years ago
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Great Unit
I bought this boiler to replace a very unreliable but expensive "high efficient" 90%+ unit. Only, 8 years old. Mercifully, its aluminum block cracked and I was forced to quit pouring money into it. Every heating season...always something. This unit was very easy to re-fit into my 4 zone home system. Reliability has been rock solid. It uses off the shelf replacement parts. I settled on this unit after a good bit of research and couldn't be happier. I should have bought a Weil-Mclain CGI series in the first place. Live and learn.
Home fool
Williamsburg VA
12 years ago
Verified Buyer
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Pleased - but I had one surprise.
Used this to replace an aged oil burner. The fact that it could tie into the existing venting was awesome, and easy replacement.
I head read about exhaust/vent noise in other reviews. Not sure what people were experiencing. The venting is quieter than my old recirculating pump...
One thing not highlighted in the instructions - there is a 1/2" npt hole in the top (for automatic air vent). It is hidden by insulation, and I found it by water pouring out... I guess I should have gone looking for it, but it let itself be known.
Very satisfied.
A Pastor
Capital Region, NY
12 years ago
Verified Buyer
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I would buy this Boiler again
I have had this boiler in my home since 2006, and I have never had a problem. The only thing I have done with this boiler is turn the thermostats up or down, and it has performed flawlessly.
feelnold
Northeast Pa.
12 years ago
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Great boiler!!!
My local distributor could not get this boiler for me in less than two weeks. [...]
Go Steelers!!!!
Pittsburgh PA
15 years ago
Verified Buyer
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Product Q&A
3 Questions3 Questions
Q: Is this unit convertable to prophane?
Asked by steve 13 years ago
Add your answer
Verified Reply- PexSupply StaffThis unit is available in an LP version, the part number is 381-357-914. There is also a conversion kit available for NG to LP, the part number is 510-811-012.
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Q: need to let air out of pipes (bleed system)where is bleeder and what does it look like
Asked by Anonymous 14 years ago
Add your answer
- Another PexSupply Customer
The way I plumbed my boiler allowed me to direct the water flow in any direction to assist in purging the air from the system. You will also still need to bleed each radiator individually.
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Q: HOW CAN I TELL WHAT SIZE HOUSE THIS UNIT IS GOOD FOR?
Asked by TONY 15 years ago
Add your answer
Verified Reply- PexSupply StaffThis unit can produce a maximum of 122,000 BTU's. To get an estimate of how many BTU's you need in your home, please use our BTU Calculator ( http://www.pexsupply.com/pex/control/BTUCalculator ). For a precise number, we would recommend that you perform a heat loss calculation.
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