Certified Backflow Valve Assembly for Footprint-Matched Replacement
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Solution Overview
Problem
The existing backflow prevention assemblies require costly and time-consuming retrofitting due to the lack of certified replacement assemblies that can accommodate varying valve lengths and footprints, leading to potential voiding of certification and inefficiencies in installation.
Innovation Solution
A method involving a spool spacer and a replacement backflow prevention valve assembly, where the spool spacer's length is determined to match the footprint of the existing assembly, allowing for a certified assembly to be manufactured and installed without retrofitting, ensuring compliance with regulatory certifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standard-length replacement valve is used, then manufacturing and certification are simplified, but the assembly cannot accommodate varying existing valve footprints
Solution Approach 1:
The replacement assembly is segmented into modular components: a standard-length backflow prevention valve and separate adjustable spools. The spools are detached elements that can be configured in different lengths and positions to adapt the assembly to various existing valve footprints while keeping the certified valve component unchanged.
Solution Approach 2:
Adjustable spools serve as intermediary components between the certified backflow prevention valve and the existing piping system. These spools act as buffer elements that absorb the dimensional mismatch between the standard-length valve and varying existing footprints, allowing the certified assembly to interface with diverse installation conditions.
2Adaptability or versatility
If a custom-length replacement assembly is manufactured to match existing footprints, then adaptability is improved, but manufacturing complexity and certification difficulty increase
Solution Approach 1:
The assembly is divided into standardized certified components and non-certified adjustable spools. Only the backflow prevention valve requires certification at a standard length, while the spools are separate, off-the-shelf components that provide length adjustment without requiring recertification.
Solution Approach 2:
The standard-length backflow prevention valve is designed as a universal component that can be used with various existing valve footprints when combined with appropriately sized spools. This multi-functional approach allows one certified valve design to serve multiple installation scenarios.
3Adaptability or versatility
If retrofitting with spools is performed on-site, then adaptability to existing footprints is achieved, but installation time and labor costs increase
Solution Approach 1:
The spools are pre-calculated and pre-configured during the design and ordering phase based on measurements of the existing valve footprint. This preliminary determination of spool requirements eliminates the need for on-site machining or complex adjustments, allowing installers to simply assemble the pre-configured components.
Solution Approach 2:
The spools are designed as simple, inexpensive, off-the-shelf components that can be easily selected and installed without requiring custom fabrication. These basic elements provide the necessary adaptation while minimizing installation complexity and time.
4Ease of operation
If the backflow prevention valve length is changed to match existing footprints, then ease of installation is improved, but certification may be voided
Solution Approach 1:
The system separates the certified backflow prevention valve (which maintains its standard length and certification) from the non-certified spool components (which provide length adjustment). This segmentation preserves the integrity of the certification while allowing flexibility in the overall assembly configuration.
Solution Approach 2:
The spools serve as intermediary elements that handle the length adjustment requirements, protecting the certified valve from modification. By placing the dimensional adaptation function in the spools rather than the valve itself, the certification validity is maintained while installation ease is improved.
Data Source
AI summary
A backflow prevention assembly is disclosed including a backflow prevention valve having a valve housing including a valve inlet end and a valve outlet end; a spool spacer of predetermined length having a first end and a second end; an inlet shut-off valve; and an outlet shut-off valve, wherein the spool spacer extends between the backflow prevention valve and one of the inlet shut-off valve and the outlet shut-off valve. The entire assembly, including the backflow prevention valve, the spool spacer, the inlet shut-off valve, and the outlet shut-off valve, is a certified assembly, certified by a certifying authority prior to installation. Methods of manufacturing a backflow prevention assembly and replacing a backflow prevention assembly are also disclosed.