A. 
Cellar floor drains may discharge into the sewer only when such drains are provided with valves or backwater valves where such valves are warranted.
B. 
Cellar floor drains receiving only floor wash water may discharge into a french drain. Under no circumstances can cellar floor drain or plumbing fixtures discharge into septic tanks or cesspools.
C. 
No floor drains shall be connected to the sewer unless and until the owner of the premises shall execute on behalf of himself and all subsequent owners a release relieving the Town from all damage, direct or consequential, which may result from said premises being flooded by the stoppage of sewers or backwater from the same.
A grease interceptor shall be installed in the waste line leading from sinks, drains or other fixtures in the following establishments when, in the judgment of the Plumbing Inspector, a hazard exists: restaurants, hotel kitchens, bars, factory, school, social or other cafeterias or restaurants, clubs or other establishments where grease can be introduced into the drainage system in quantities that can effect line stoppage or hinder sewage disposal.
Every public garage, service station or other structure for the housing, sale, servicing or repair of motor vehicles shall be provided with a proper means for draining the floors or pits. They shall have a special connection discharging through an intercepting trap, located under the direction of the Plumbing Inspector. Such trap shall be so arranged as to intercept all oil, gasoline or other inflammable fluids, sand, silt and all other solids for the purpose of excluding the same from the sewage system. Such trap shall be watertight, so located as to be easily accessible for cleaning and inspection provided with a suitable manhole frame and cover and of a design and capacity approved by the Plumbing Inspector in advance of installation. Oil, gasoline or other inflammable fluids, sand, silt or other solids shall be regularly removed and promptly disposed of, and the trap shall be so maintained to ensure the exclusion of such substances from the sewerage system.
Garbage grinders or disposal units may be installed in private residences only and shall be subject to the approval of the Plumbing Inspector as to the ability of such grinder to properly grind food waste disposed of therein.
No direct cross-connections shall be made between the water supply and plumbing connected to the sewer in such manner as to permit back-siphonage of sewage in the water supply system.
A sump pump may be connected to the building drain only under the following conditions:
A. 
Only domestic sewage waste originating within the household shall be discharged from the sump.
B. 
The sump shall be constructed with watertight sides and bottom and shall admit no ground- or surface waters. No pipe shall discharge into the sump which serves to drain groundwater under cellar floor slabs or from around foundations.
C. 
Where any sump pump is connected to the sewer, it shall be noted upon the plumbing permit, and the Town shall at all times have the right to inspect the sump, and in the event that water other than domestic sewage waste are determined to be entering the sump, the Town shall have the right to order the disconnection of said sump from the sewer and such order shall be immediately carried out.
It shall be the duty of every person to whom a plumbing permit shall hereafter be issued to promptly notify the Plumbing Inspector of any additional fixtures which may be installed within the property to which the plumbing permit refers.