Manhole Adjusting Rings

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R-1979 Series

Manhole Adjusting Rings

Heavy Duty

For raising manhole covers when pavement is resurfaced.

Adjusting rings (or extension rings, as they are sometimes called) eliminate the necessity of raising or replacing existing manhole frames on resurfacing projects. The cover recess is the same depth and diameter as the existing manhole frame. Amount of raise coincides with thickness of resurfacing material, thereby bringing the manhole lid to new position flush with refinished roadway surfaces.

Manhole adjusting rings can be placed rapidly and are a permanent installation. Use of adjusting rings may reduce raising costs to as little as 20% of digging up the old manhole frame and resetting it to a new grade.

CAUTION WHEN ORDERING

Be sure existing lid diameters are smaller than "AA" dimension in table. "AA" dimension in table is opening size in extension ring. Lid should measure 1/4" to 3/8" less in diameter than this dimension.

* Adjusting ring is for Non-Rocking applications ** Gasketed for self-seal application *** Ring furnished in ductile iron ≠ 5 degree draft ¥ 10 degree draft § for R-1750-B only

Ref. Number	A-A	B-B	F	Rise
1913-7100	7 5/8	2	2 7/8	1
1913-7150	7 5/8	2	3 3/8	1 1/2
1979-0245	9 5/16	5/8	2 1/8	1 1/2
1979-0246	9 5/16	5/8	2 5/8	2
1979-0166	18 3/8	1	3	1 15/16
1979-0167	18 3/8	1	4	2 15/16
1979-0008	21 1/2	1	3	2
1979-0115	21 1/2	1	3 1/2	2 1/2
1979-0022	21 1/2	1	4	3
1915-7200 **	21 3/4	1	2 31/32	2
1692-7200	21 7/8	1 1/4	3 1/8	2
1979-0223	22 1/8	1 1/8	3 1/8	2
1500-7200	22 1/4	1 1/2	3 1/2	2
1979-0035 *	22 1/4	1 1/2	3 1/2	2
1500-7250	22 1/4	1 1/2	4	2 1/2
1979-0036 *	22 1/4	1 1/2	4	2 1/2
1500-7300	22 1/4	1 1/2	4 1/2	3
1979-0119 *	22 1/4	1 1/2	4 1/2	3
1979-0270 *	22 5/16	1 1/2	3	1 1/2
1979-0258	22 3/8	1	3	2
1762-7150	22 1/2	1	2 1/2	1 1/2
1979-0215	22 1/2	1	5	4
1979-0034	22 1/2	1 1/2	3 1/2	2
1979-0116	22 1/2	1 1/2	4 1/2	3
1979-0047	22 3/4	1 1/2	3 1/2	2
1979-0131	22 3/4	1 1/2	4	2 1/2
1979-0019	22 3/4	1 1/2	4 1/2	3
1580-7150 *	22 3/4	1 3/4	3 1/4	1 1/2
1979-0129 *	22 3/4	1 3/4	3 3/4	2
1979-0170 *	22 3/4	1 3/4	4 3/4	3
2424-7200	22 3/4	2 5/8	4 5/8	2
1661-7100	22 7/8	1 1/2	2 1/2	1
1661-7158 ***	22 7/8	1 1/2	3 1/8	1 9/16
1661-7200	23	1 1/2	3 1/2	2
1979-0004	23	1 1/2	4	2 1/2
1979-0005	23	1 1/2	4 1/2	3
1713-7101	23	1 3/4	2 3/4	1
1713-7150	23	1 3/4	3 1/4	1 1/2
1713-7200	23	1 3/4	3 3/4	2
1979-0177	23	1 3/4	4	2 3/16
1713-7250	23	1 3/4	4	2 1/2
1713-7300	23	1 3/4	4 3/4	2 15/16
1715-7176	23 1/16	1 3/4	3 1/2	1 3/4
1979-0139 *	23 1/8	1 3/4	4 1/4	2 1/2
1979-0146 *	23 1/8	1 3/4	4 3/4	3
1979-0023 *	23 7/32	1 1/2	4 1/2	3
1550-7150	23 1/4	1 1/2	3	1 1/2
1550-7151 *	23 1/4	1 1/2	3	1 1/2
1550-7200	23 1/4	1 1/2	3 1/2	2
1550-7201 *	23 1/4	1 1/2	3 1/2	2
1979-0010	23 1/4	1 1/2	4	2 1/2
1979-0106	23 1/4	1 1/2	4 1/2	3
1979-0128 *	23 3/8	1 1/2	4	2 1/2
1979-0181 *	23 3/8	1 3/4	3 3/4	2
1979-0006 *	23 7/16	1 1/2	3 1/2	2
1979-0180	23 1/2	1	2 5/8	1 1/2
1797-7300	23 1/2	1	4	3
1979-0024	23 1/2	1 1/2	3 1/2	2
1979-0025	23 1/2	1 1/2	4	2 1/2
1979-0026	23 1/2	1 1/2	4 1/2	3
1979-0275	23 3/4	1	2 5/8	1 5/8
1979-0150	23 3/4	1	3	2
1979-0265	24	1	2 1/2	1 7/16
1979-0253	24	1	2 1/2	1 1/2
0000-0034	24	1	2 9/16	1 1/2
1979-0065	24	1	2 5/8	1 5/8
1979-0264	24	1	3	1 15/16
0000-0545	24	1	3 1/16	2
0000-1309	24	1	3 9/16	2 1/2
0000-0814	24	1	4 1/16	3
1979-0273	24	1	4 1/4	2 1/2
1979-0254	24	1	4 1/2	2
1979-0012	24	1 1/2	3 1/2	2
1979-0042 *	24	1 1/2	3 1/2	2
1979-0046	24	1 3/4	4 1/4	2 1/2
1979-0044	24	1 3/4	4 3/4	3
1979-0145	24 3/16	1 1/8	2 9/16	1 7/16
1979-0143	24 1/4	1	3	2
1979-0033	24 1/2	1 1/2	3 1/2	2
1979-0040	24 1/2	1 3/4	4 1/4	2 1/2
1979-0041	24 1/2	1 3/4	4 3/4	3
1767-7100	25	1	2	1
1979-0160	25	1	2 1/2	1 1/2
1979-0171	25	1	3	2
1979-0272	25	1	3 1/2	2
1979-0058	25	1 1/2	3 1/2	2
1979-0134	25	1 3/4	4 1/4	2 1/2
1979-0144	25	1 3/4	4 3/4	3
1979-0271 *	25 5/16	1 1/2	3	1 1/2
1979-0266	25 1/2	1 1/4	3 1/2	2
1979-0158	25 1/2	1 1/4	3 3/4	2 3/8
1979-0037	25 1/2	1 1/2	3 1/2	2
1979-0118 *	25 1/2	1 1/2	3 3/4	2
1979-0117 *	25 1/2	1 1/2	4 3/4	3
1979-0137	25 1/2	1 3/4	4 1/4	2 1/2
1979-0124	25 1/2	1 3/4	4 3/4	3
1979-0074	25 7/8	7/8	3 3/8	2 1/2
1979-0076	25 7/8	7/8	4 3/8	3 1/2
1979-7200	25 15/16	1	3	2
4353-0019	26	7/8	2 3/8	1 1/2
4353-0017	26	7/8	2 7/8	2
4353-0013	26	7/8	3 7/8	3
1979-0278	26	1	2	1
1979-0279	26	1	2 1/2	1 3/8
1979-0280	26	1	3	1 7/8
1979-0055	26	1 3/8	3 3/8	1 15/16
1979-0102	26	1 3/8	3 7/8	2 1/2
1979-0051	26	1 3/8	4 3/8	2 15/16
1979-0176	26	1 1/2	3 1/2	1 15/16
1642-7150	26 1/8	1 1/2	3	1 1/2
1642-7200	26 1/4	1 1/2	3 1/2	2
1642-7250	26 1/4	1 1/2	4	2 1/2
1642-7300	26 1/4	1 1/2	4 1/2	3
1979-0062	27	1 3/8	3 3/8	2
1979-0263	28	1	2 1/2	1 7/16
1979-0250	28	1	3	1 15/16
1979-0251	28	1	4	3
1979-0091 §	28 1/4	1	3	2
1979-7190	28 1/4	1 3/8	3 3/8	1 7/8
1753-7200	29	1 3/8	3 3/8	1 15/16
1979-0054 ¥	29	1 3/8	3 3/8	1 15/16
1979-0043	29	1 3/8	3 13/16	2 1/2
1979-0015	29	1 3/8	4 3/8	2 15/16
6052-7218	29 3/8	1 3/4	4	2 3/16
6052-7293	29 3/8	1 3/4	4 3/4	2 15/16
1979-0203	30 3/8	1 1/2	4 1/2	3
1743-7200	31 15/16	1 3/4	3 3/4	2
1743-7300	31 15/16	1 3/4	4 3/4	3
1979-0052	32	1 3/8	4 3/8	2 15/16
1743-7150	32	1 3/4	3 1/4	1 1/2
1979-0053	32	1 3/8	3 3/8	1 15/16
1979-0057	33 1/2	1 1/2	3 1/2	1 15/16
1979-0049	33 1/2	1 1/2	4 1/2	2 15/16
1979-0092	35 1/2	2	4 1/2	2 1/2
1979-0268	36	1 1/4	2 1/4	1
1979-0269	36	1 1/4	2 3/4	1 1/2
1979-0056	36 1/2	1 1/2	3 1/2	1 15/16
1979-0050	36 1/2	1 1/2	4 1/2	2 15/16
1979-0093	38	1 1/2	3 1/2	2
1979-0136	38 1/4	1 1/2	3 1/2	2
1742-7200	39	1	3	2
1979-0252	40 1/16	3	4 1/2	3 3/4

Square/Rectangular

Ref. Number	A-A	B-B	F	Rise
1978-0022	8 1/8 x 8 1/8	7/8	2 7/8	2
1979-0249	8 1/8 x 8 1/8	7/8	2 1/8	1 1/4
0000-1090	13 3/8 x 19 3/8	1 1/4	3 1/4	2
3278-7225	16 3/4 x 22 1/4	1 3/4	4	2 1/4
0000-1029	19 3/8 x 20 3/8	1 1/4	3 1/4	2
0000-1081	19 3/8 x 19 3/8	1 1/4	3 1/4	2
3278-0015	22 1/4 x 16 15/16	1 3/4	4 1/8	2 1/2
3287-7250	22 3/4 x 45 3/8	2	4 7/16	2 1/2