Gas-Pipe Connection Sizes

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100% Make-Up Air & 80/20 System

Maxitrol Control System Natural Gas Connection Size
Gas Pressure ("WC)
BTU Input	7 to 13"	14 to 28"	29" to 2PSI
275	1/2	1/2	1/2
550	3/4	3/4	1/2
990	1	3/4	3/4
1375	1 1/4	3/4	3/4
1650	1 1/2	1	1
1925	2	1	1
2750	2	1 1/2	1
3025	2	1 1/2	1 1/4
3300	2	2	1 1/4
3850	2	2	1 1/2
4400	2	2	2
5225	2 1/2	2	2
7425	3	3	2
8525	3	2 1/2	2
9075	-	2 1/2	2
11825	-	3	2
15552	-	2 1/2	2 1/2
16848	-	2 1/2	3

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