---
kind: "range"
citation: "33 C.F.R. §§ 159.103–159.117"
title: "33"
from: "159.103"
to: "159.117"
count: 7
url: "https://uscodex.org/cfr/33/159.103..159.117"
---

# §159.103. Vibration test.


The device, with liquid retention components, if any, filled with water to one-half of their volume, must be subjected to a sinusoidal vibration for a period of 12 hours, 4 hours in each of the x, y, and z planes, at the resonant frequency of the device (or at 55 cycles per second if there is no resonant frequency between 10 to 60 hertz) and with a peak amplitude of 0.019 to 0.021 inches.


# §159.105. Shock test.


The device, with liquid retention components, if any, filled with water to half of their volume, must be subjected to 1,000 vertical shocks that are ten times the force of gravity (10g) and have a duration of 20-25 milliseconds measured at the base of the half-sine shock envelope.


# §159.107. Rolling test.

- (a) The device, with liquid retention components, if any, filled with water to half of their volume, must be subjected to 100 cycles with the axis of rotation 4 feet from the centerline of the device, no more than 6 inches below the plane of the bottom of the device, and parallel to any tank baffles. The device must then be rotated 90 degrees on its vertical axis and subjected to another 100 cycles. This testing must be repeated with the liquid retention components filled to the maximum operating level as specified by the manufacturer in [§ 159.57](/cfr/33/159.57.md).
- (b) Eighty percent of the rolling action must be approximately 15 degrees on either side of the vertical and at a cyclic rate of 3 to 4 seconds. Twenty percent motions must be approximately 30 degrees, or the maximum angle specified by the manufacturer under [§ 159.57](/cfr/33/159.57.md), whichever is greater, on either side of the vertical at a cyclic rate of 6 to 8 seconds.

# §159.109. Pressure test.


Any sewage retention tank that is designed to operate under pressure must be pressurized hydrostatically at a pressure head of 7 feet or to 150 percent of the maximum pressure specified by the manufacturer for operation of the tank, whichever is greater. The tank must hold the water at this pressure for 1 hour with no evidence of leaking.


# §159.111. Pressure and vacuum pulse test.


Liquid retention components of the device with manufacturer specified venting installed must be subjected to 50 fillings of water at a pressure head of 7 feet or the maximum pressure specified by the manufacturer for operation of the device, whichever is greater, and then emptied with a 45 gallon per minute or larger positive displacement pump that remains in operation 30 seconds after emptying the tank at the end of each cycle.


# §159.115. Temperature range test.

- (a) The device must be held at a temperature of 60 °C or higher for a period of 16 hours.
- (b) The device must be held at a temperature of −40 °C or less for a period of 16 hours following winterization in accordance with manufacturers' instructions.

# §159.117. Chemical resistance test.

- (a) In each case where the recognized facility doubts the ability of a material to withstand exposure to the substances listed in paragraphs [(b)](#b) and [(c)](#c) of this section a sample of the material must be tested.
- (b) A sample referred to in [paragraph (a)](#a) of this section must be partially submerged in each of the following substances for 100 hours at an ambient temperature of 22 °C.
  - (1) **Sewage.**
  - (2) **Any disinfectant that is required in the operation of the device.**
  - (3) Any chemical compound in solid, liquid or gaseous form, used, emitted or produced in the operation of the device.
  - (4) Fresh or salt (3.5 percent Sodium Chloride) flush water.
  - (5) **Toilet bowl cleaners.**
  - (6) **Engine Oil (SAE/30).**
  - (7) **Ethylene Glycol.**
  - (8) **Detergents (household and bilge cleaning type).**
- (c) A sample of the material must be doused 20 times, with a 1 hour drying period between dousings, in each of the following substances:
  - (1) **Gasoline.**
  - (2) **Diesel fuel.**
  - (3) **Mineral spirits.**
  - (4) **Turpentine.**
  - (5) **Methyl alcohol.**