Answer

“Punya Kalash Sthapna” in Jain usage usually refers to an auspicious kalash स्थापना done at the beginning of a religious program, such as Paryushan. In the event material I found, it is listed separately from the actual tapasya items, so it appears to be a ceremonial observance rather than a standard independent tap. ( bjs.org.au)

Explanation

In simple terms, the kalash is treated as a symbol of purity, auspiciousness, and a sacred beginning. In the Paryushan program page, “Punya Kalash Sthapna” is mentioned alongside the opening of the festival, while tapasyas like ekasanu, biyasanu, upvas, and ayambil are listed separately. ( bjs.org.au)

Spiritual Understanding

The inner भाव is to begin the observance with shuddhi, bhakti, and a पुण्य-mindset, so that the atmosphere becomes sacred for pratikraman, pravachan, and tapa. This is an interpretation of how such a ceremony functions in Jain community practice. ( bjs.org.au)

Takeaway

So, if someone says “Punya Kalash Tap,” they are usually referring to the auspicious Punya Kalash Sthapna ceremony, not a widely standardized tap like upvas or ayambil. If you want, I can also explain the exact Jain meaning of “kalash,” “punya,” and “sthapna” one by one. ( bjs.org.au)