An alkaline water tank is a storage tank sold with technology meant to give stored water a pH above 7. P4 has an alkaline technology water tank, and it is known as the Silver P4 International. It comes with P4’s Silver Patented Alkaline Technology, and it suits people who like the taste of higher-pH water and want a silver antimicrobial layer in the same tank. It’s a preference, not a medical need, and this page explains why.
What Does “Alkaline” Mean?
pH is a scale from 0 to 14 that measures how acidic or alkaline a liquid is. Seven is neutral. Anything above seven is alkaline, anything below is acidic. Indian drinking-water standards (IS 10500) accept a pH between 6.5 and 8.5, and a lot of treated water already sits inside that range.
So an alkaline tank isn’t fixing a problem in most homes. It’s offering water at the higher end of an already safe range, or slightly above it, depending on the model and your source water.
What Is P4’s Alkaline Technology?
P4 has an alkaline technology water tank. It is known as the Silver P4 International, and P4 sells it under the name Silver Patented Alkaline Technology. It comes in two models.
- Base Model: 7 layers with PUF foam insulation, D²LF double lids and 30% extra storage.
- Top Model: 9+1 layers, a free external skin jacket, a free anti-scaling device, D²LF double lids and 30% extra storage.
Alongside the alkaline technology, P4 bonds silver with the polymer in nano form. Silver has antimicrobial properties, which means it can inhibit certain bacteria on the tank’s inner surface. You can read more on our silver nano technology and metal technology pages.
Does Silver Make Water Alkaline?
Not by itself. Silver is an antimicrobial agent, and alkalinity is about pH. They’re two different things. In P4’s alkaline technology water tank, the Silver P4 International, they come together in one tank, which is why it’s sold under both names. If you want to know how far a particular tank shifts pH, ask your dealer for the tested figure for that model. It depends on the model and your source water.
Is Alkaline Water Healthier?
Here’s the honest answer. Many claims about alkaline water improving health aren’t backed by strong evidence. If you like how it tastes, that’s a fine reason to buy. If you’re buying it to manage a medical condition, talk to a doctor first. No tank replaces medical advice.
Alkaline Tank vs Standard Tank
| Feature | Silver P4 International (alkaline technology) | Standard food-grade tank |
|---|---|---|
| pH technology | Yes | No |
| Silver antimicrobial layer | Yes, silver bonded in nano form | No |
| Taste | Neutral. Some people find alkaline water smoother | Neutral |
| Extra storage | 30% extra | Not usually |
| Upkeep | Clean every 6 to 12 months | Clean every 6 to 12 months |
| Certification | P4 lists IS 10146 and IS 10500 for its tanks | Ask for the certificate |
| Price | Higher | Lower |
Who Should Consider an Alkaline Tank
- People who prefer the taste of higher-pH water and want it at tank scale instead of buying alkaline bottles
- Households that also want a silver antimicrobial layer in the tank
- Homes with hard water, since the Top Model includes an anti-scaling device
- Families who store water for several days and want an insulated build (the Base Model has PUF foam insulation)
You can skip it if your water test already shows a pH between 6.5 and 8.5 and you have no taste preference. In that case a certified food-grade tank and regular cleaning do the same core job for less. See our food grade water tank guide.
Picture a family of four on treated municipal water whose lab report shows a pH of 7.4. That’s already slightly alkaline and well inside the safe range. For them, an alkaline tank adds little beyond the silver layer. Now picture a household that has tried alkaline bottled water, liked it, and wants it from every tap. That’s the buyer this tank is made for.
How to Check Your Water’s pH Before You Buy
- Fill a clean, rinsed bottle from the tap you drink from.
- Test it with a digital pH meter or test strips for a quick reading, or send it to an accredited lab (look for NABL accreditation) for a reliable one.
- Ask the lab for TDS, hardness and a bacterial count as well. They tell you more about your water than pH alone.
- Read the results against IS 10500. If your pH is already between 6.5 and 8.5, an alkaline tank won’t solve a problem.
Alkaline, Copper or Standard: How to Decide
- Silver P4 International: you want alkaline technology and a silver layer in one tank, with a neutral taste.
- Copper P4 International: you value the traditional copper-water habit and don’t mind a faint metallic note.
- 5-layer PUF foam-insulated International: you mainly want an insulated tank at a lower price.
- Standard food-grade tank: budget comes first, and certification plus regular cleaning matter most.
What It Costs
The P4 shop lists these MRP ranges. Each range spans several capacities, so compare the same capacity across lines.
- Silver P4 International, Base Model (7 layers): ₹31,500 to ₹84,000
- Silver P4 International, Top Model (9+1 layers): ₹41,250 to ₹110,000
- 5-layer PUF foam-insulated International tank, for comparison: ₹16,500 to ₹44,000
Spread the premium over the tank’s life to see what it really costs. Using made-up numbers (not P4 prices): a ₹3,000 premium over a 10-year life is ₹300 a year, or about ₹25 a month. If you also want copper instead, our copper water tank price guide shows how that line is priced.
What an Alkaline Tank Doesn’t Do
- It isn’t a purifier. It doesn’t remove heavy metals, pesticides, salts or other dissolved chemicals.
- It doesn’t replace your filter at the tap.
- It doesn’t make an uncleaned tank safe. Sediment and biofilm build up in every tank.
- It doesn’t treat health conditions.
Looking After an Alkaline Tank
Clean the tank every 6 to 12 months, keep the lids closed, and keep harsh acids and abrasive scrubbing away from the inner surface. P4 says its tanks are suitable for both outdoor and underground storage, and that they come with a manufacturer’s warranty. Ask for the term for your model in writing.
Alkaline Water Tank: FAQs
Does P4 have an alkaline technology water tank?
Yes. P4’s alkaline technology water tank is known as the Silver P4 International. It’s sold as Silver Patented Alkaline Technology in a Base Model and a Top Model.
What is an alkaline water tank?
It’s a storage tank sold with technology meant to give stored water a pH above 7. P4’s alkaline technology water tank is the Silver P4 International.
What is the difference between an alkaline tank and an alkaline water purifier?
A tank works at the storage stage for the whole household’s supply. A purifier works at the tap on the water you drink. They do different jobs, and you may still want a purifier.
Can I use an alkaline tank for all my household water?
Yes. It’s a storage tank, so it holds the water that feeds the whole house. If you only want alkaline water for drinking, you may not need one at that scale.
Is the tank safe for drinking water?
P4 says its tanks are food grade and certified to IS 10146 and IS 10500 for contact with drinking water. Ask the dealer for the certificate covering the exact model.
How much does the Silver P4 International cost?
On the P4 shop, the Base Model has an MRP range of ₹31,500 to ₹84,000 and the Top Model ₹41,250 to ₹110,000, depending on capacity. Dealers often sell below MRP, so ask for an itemised quote.
Does an alkaline tank need special cleaning?
No. Clean it on the same 6 to 12 month schedule as any tank, using a mild approach. Avoid harsh acids and abrasive scrubbing on the inner surface.
See the Silver P4 International, P4’s alkaline technology water tank, and get a quote from your nearest dealer.