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  • Feb 16, 2026
    Update date
  • Security
  • Everyone
  • Android 8.0+
    Android OS

About NPC

NPC Pro LSI Calculator & Start Up Guide

NPC Pro LSI Calculator & Startup Guide – The Ultimate Water Chemistry Tool for Pool Professionals!

Developed by the National Plasterers Council (NPC), the NPC Pro LSI Calculator & Startup Guide is the essential app for pool professionals, technicians, and service providers. Whether you’re calculating the Langelier Saturation Index (LSI) to ensure balanced water chemistry or following proper startup procedures for new plaster finishes, this app simplifies the process with accuracy and ease.

Key Features:

- LSI Calculator – Quickly determine water balance to prevent scaling, etching, and plaster degradation.

- Water Chemistry Guide – Get precise recommendations for pH, alkalinity, calcium hardness, and more.

- Startup Procedures – Follow NPC’s step-by-step plaster startup guide for long-lasting, durable finishes.

- Easy Data Input – Enter key pool chemistry values and get instant LSI results.

- Professional-Grade Accuracy – Designed for pool contractors, service techs, and water chemistry experts.

- User-Friendly Interface – Simplifies complex calculations for effortless use on the job.

- Ask The Expert – If you have questions we have answers, use our ask the expert form to get answers to your toughest questions from the NPC community experts.

- Connect. Engage. Explore. In addition to the tools, NPC Pro offers you access to find members, stream podcasts, access technical resources, connect with NPC social media and more.

Why Use the NPC Pro LSI Calculator & Guide?

Balanced water chemistry is crucial to maintaining a beautiful, durable swimming pool finish. The LSI Calculator ensures your water is within the ideal range, preventing costly repairs and extending the life of pool surfaces. The Startup Guide provides step-by-step instructions to correctly introduce new plaster finishes, avoiding common issues like discoloration or surface roughness.

Whether you’re a pool professional, service technician, or pool owner looking for precise water chemistry management, this app is your go-to tool!

Download the NPC Pro LSI Calculator & Startup Guide today and take the guesswork out of pool chemistry!

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Additional APP Information

Latest Version

2.1.1

Uploaded by

Marcelo Ferraz

Requires Android

Android 8.0+

Available on

Content Rating

Everyone

Security Report

What's New in the Latest Version 2.1.1

Last updated on Feb 16, 2026

Updated LSI calculator
3 new volume calculators
NPC site integration
Pool Startup procedures
Technical bulletins
New entry save data interface
Flex your finish
NPC podcast links and player
Flex your finish
Push notifications

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Security Check Completed
No Virus
No Spyware
No Malware
No Virus
No Spyware
No Malware
Package Name:com.tso.npc
SHA-256:5f31bce9cb03d43685e09c5557a0fc4bc94247a8e392e1fde6c5fd30ce01eaac
SHA-1:b753c0b7fbea760a3e6b7bb1dc2781f5ffaab538
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Verified by: APKPURE

NPC Screenshots

NPC posterNPC screenshot 1NPC screenshot 2NPC screenshot 3NPC screenshot 4NPC screenshot 5NPC screenshot 6NPC screenshot 7

Old Versions of NPC

XAPK
36.7 MBFeb 16, 2026
Download
XAPK
29.1 MBFeb 7, 2025
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All Versions

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