• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Suggested code sections
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

Section 3129B Rapid Sand Pressure Filters

Los Angeles Building Code > 31B [DPH] Public Pools > 3129B Rapid Sand Pressure Filters
JUMP TO FULL CODE CHAPTER

In addition to the requirements for all filters as indicated in Section 3128B, the following apply to rapid sand pressure filters.

3129B.1 Flow Rates

The filtration rate shall not exceed 3 gallons per minute per square foot (122.24 L/m per m2) of filter area. The backwash rate shall not be less than 15 gallons per minute per square foot (611.2 L/m per m2) of filter area.

3129B.2 Filter Media

The filter shall contain not less than a 20-inch (508 mm) depth of media and not less than a 10-inch (254 mm) depth of filter gravel above the underdrain system.

3129B.2.1

The filter media shall have an effective particle size between 0.40 and 0.55 millimeters and a uniformity coefficient not exceeding 1.75.

3129B.2.2

The filter gravel shall be sized and placed to provide uniform flow distribution from the underdrain system and to support the bed of filter sand without loss of sand to the pool or without development of jet streams or channeling in the filtration media.

Related Code Sections


Section 3129B [DPH] Public Pools, Rapid Sand Pressure Filters
In addition to the requirements for all filters as indicated in Section 3128B, the following apply to rapid sand pressure filters ...
Los Angeles Building Code > 31B [DPH] Public Pools > 3129B Rapid Sand Pressure Filters
3126B.1 [DPH] Public Pools,
Pool recirculation pumps shall have the following total dynamic head capacities: Pressure diatomaceous earth filters. At least 60 feet (18,288 mm ...
Los Angeles Building Code > 31B [DPH] Public Pools > 3126B Recirculation Pump Capacity > 3126B.1
A4.506.1 Residential Voluntary Measures, Filters
Return air filters with a value greater than MERV 6 shall be installed on HVAC systems. Pressure drop across the filter shall not exceed 0.1 inches ...
Los Angeles Green Building Code > A4 Residential Voluntary Measures > A4.506 Indoor Air Quality and Exhaust > A4.506.1 Filters
Section 3131B [DPH] Public Pools, High-Rate Sand Filters
In addition to the requirements for all filters as indicated in Section 3128B, the following apply to high rate sand filters ...
Los Angeles Building Code > 31B [DPH] Public Pools > 3131B High-Rate Sand Filters
2404.7.8 Flammable Finishes, Filters
Air intake filters that are part of a wall or ceiling assembly shall be listed as Class I or II in accordance with UL 900. Exhaust filters shall ...
2017 LA City Fire Code > 24 Flammable Finishes > 2404 Spray Finishing > 2404.7 Ventilation > 2404.7.8 Filters
Help Contact Us Privacy Terms
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
View thousands of relevant UL Certified products and assemblies that help achieve code compliance
View thousands of relevant UL Certified products and assemblies that help achieve code compliance
Access to UL product and system certification information.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
Join the waitlist
We are looking to gauge the level of interest in linking UL product and system certification information alongside related code sections.

Let us know your email and we’ll ping you once it’s ready! Learn more.

Thank you for your interest!

If you’re open to it, we would love to jump on the phone to make sure we’re building this in the best way possible for your workflow. Any insight or advice would be greatly appreciated. We’ve sent you an email with a calendar link to book at time with us.


Cancel
Get Early Access
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE