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Proper LP Inspection - Texas Onsite Wastewater Association

Proper LP Inspection - Texas Onsite Wastewater Association

Why use the Travis

Why use the Travis County Method? • Better distribution (more even) • Better model of LPD hydraulic system • Suitable across greater elevation changes • No ‘extra’ valves • Valves can shift open and close • Multiple valves in a zone more difficult to set to make “false” head • More efficient use of pumps • Improved accuracy in estimating flow rates • Easily adjusts for complex layouts

Issues with Travis County Method • Requires more calculations • Requires better site measurements (accurate elevations) • Requires potentially more designer trips to site • Requires designer and installer to work together • Does not allow for a ‘cookie cutter’ approach • Flow can be off if orifice blocked by gravel • Variations in friction coefficients and average I.D. of pipe can make review and comparison difficult • No formal research to back method

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