NAC444.806. Precast septic tanks.

For precast septic tanks:

     1. All forms used in placing concrete must be smooth, and sufficiently designed and braced to maintain their alignment under the pressure of the concrete during placing.

     2. Precast sections must be set evenly in a full bed of sealant. Excessively mortared joints must be trimmed flush. Sealants used between the joints are at the manufacturer’s discretion, unless otherwise specified by the health authority. If grout is used, it must consist of two parts sand to one part cement with sufficient water added to make the grout flow under its own weight. The grout must be poured into a water-soaked groove, and filled to the top of the groove in the previously set section. If mastic joint compound is used, it must be placed along the walls of the groove unless a double amount of mastic joint compound is to be used as a further precaution against leakage. If a double amount of mastic joint compound is used, the mastic sealant must be placed on the two shoulders of the groove. If polyurethane is used, it must be mixed as directed by the manufacturer of the polyurethane and placed in the groove. The next section must be placed while the foaming reaction for the previous section is still in process.

     3. For the purpose of early reuse of forms, the concrete may be steam cured. Other curing by means of water spraying or a membrane curing compound may be used.

     [Bd. of Health, Indiv. Sewage Disposal Systems Reg. §§ 12.6.12-12.6.12.3, eff. 11-23-72]—(NAC A by R129-98, 3-25-99)