Polyethylene crosslink pipe SDR9 (a) (PEX-a).
Omaha Municipal Code § 49-826
in effectSec. 49-826. - Polyethylene crosslink pipe SDR9 (a) (PEX-a).
PEX-a SDR9 may be used as permitted in section 49-555 and 49-556 for potable water and for high purity water. It shall not be co-mingled, inserted or mixed with other materials except as permitted below. Fittings and connections shall comply with the following standards and provisions:
(a) Shall carry the Material Designation Code PEX 5206.
(b) Shall not be installed using a manifold system.
(c) Shall only be permitted in sizes one-half inch through one inch.
(d) Shall be rigid (straight length) 20 foot.
(e) Shall be blue in color for cold lines and red in color for hot lines.
(f) Shall not be used with instantaneous-type (coil or immersion) water heaters.
(g) Soldered metal fittings shall not be installed closer than 18 inches. There shall be a minimum of 12 inches from the connection to the water heater and PEX piping.
(h) It shall only be used above ground.
(i) The piping from the shower or tub valve to the shower head and tub spout shall be copper pipe and fittings.
(j) Cold expansion fittings with PEX reinforcing rings shall comply with ASTM F 1960 and be engineered polymer (EP).
(k) When connecting to an existing PEX systems, all additional pipe, fittings and connections shall be the same type and material as the existing system.
(l) Support:
(1) Horizontal pipe: Each pipe shall be supported individually at no more than 32 inches intervals with a minimum clear spacing of three inches between parallel lines.
(2) Vertical pipe: Each pipe shall be supported individually at no more than 48 inches intervals with a minimum clear spacing of three inches between parallel lines.
(m) Thermal expansion:
(1) Support pipe according to subsection (1) above, but do not rigidly restrain the pipe at branches or change of direction.
(2) Do not anchor pipe rigidly in walls. All holes shall be adequately sized to allow for free movement.
(3) Tables 49-826(m) below provides expansion loop requirements. (See Figure 49-826(m)(3).)
(4) There shall not be any branches connected to the expansion loop.
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Table 49-826(m)
Length of Run (feet)
10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110
½ | A | 13.9 | 19.7 | 24.0 | 28.0 | 31.0 | 34.0 | 37.0 | 39.5 | 42.0 | 44.0 | 46.0
B | 3.0 | 4.0 | 5.0 | 6.0 | 6.2 | 6.8 | 7.4 | 7.9 | 8.4 | 8.8 | 9.2
¾ | A | 16.5 | 24.0 | 28.5 | 33.0 | 37.0 | 40.5 | 43.5 | 46.5 | 49.5 | 52.0 | 54.5
B | 3.5 | 5.0 | 6.0 | 7.0 | 7.4 | 8.1 | 8.7 | 9.3 | 9.9 | 10.4 | 10.9
1 | A | 18.5 | 26.5 | 32.5 | 37.5 | 42.0 | 46.0 | 49.5 | 53.0 | 56.0 | 59.0 | 62.0
B | 4.0 | 5.5 | 7.0 | 8.0 | 8.4 | 9.2 | 9.9 | 10.6 | 11.2 | 11.8 | 12.4
1¼ | A | 20.5 | 29.0 | 36.0 | 41.5 | 46.0 | 50.5 | 54.5 | 58.5 | 62.0 | 65.5 | 68.5
B | 4.1 | 5.8 | 7.2 | 8.3 | 9.2 | 10.1 | 10.9 | 11.7 | 12.4 | 13.1 | 13.7
1½ | A | 22.5 | 32.0 | 39.0 | 45.0 | 50.5 | 55.0 | 59.5 | 63.5 | 67.5 | 71.0 | 75.0
B | 4.5 | 6.4 | 7.8 | 9.0 | 10.1 | 11.0 | 11.9 | 12.7 | 13.5 | 14.2 | 15.0
2 | A | 25.5 | 36.5 | 44.5 | 51.5 | 57.5 | 63.0 | 68.0 | 72.5 | 77.0 | 81.0 | 85.0
B | 5.1 | 7.3 | 8.9 | 10.3 | 11.5 | 12.6 | 13.6 | 14.5 | 15.48 | 16.2 | 17.0
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(Ord. No. 40524, § 1, 10-20-15; Ord. No. 42654, § 31, 8-13-21)
Source: City of Omaha, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ne/omaha/codes/code_of_ordinances?nodeId=OMMUCOCHGEORVOII_CH49PL_ARTVIIIQUWEINMA_S49-826POCRPISDPFetched: 10/28/2026